Here is a list of over 150 keywords for mini niche websites.  These keywords have been research on Google Adwords with their estimated average CPC (cost-per-click) and the Google US (United States) search volume statistics (as of June 2009).

Please check out the sample mini niche website based on that keyword or keyword phase.

Keyword	Estimated Average CPC	US Search Volume: June 2009	Sample Mini Niche Website
Fourth of July	$0.71	1,220,000	Click Here View Sample Site
Acupuncture	$1.60	1,500,000	Click Here View Sample Site
Adoption	$1.46	11,100,000	Click Here View Sample Site
Airline Travel	$1.82	700,000	Click Here View Sample Site
Air Purifiers	$6.20	1,770,000	Click Here View Sample Site
Alarm System	$7.15	900,000	Click Here View Sample Site
Alternative Energy	$1.99	301,000	Click Here View Sample Site
American History	$0.95	1,500,000	Click Here View Sample Site
Anti Aging	$2.83	2,000,000	Click Here View Sample Site
Antioxidants	$2.00	700,000	Click Here View Sample Site
Antivirus	$2.35	6,120,000	Click Here View Sample Site
Aquarium	$0.53	7,120,000	Click Here View Sample Site
Aromatherapy	$3.01	550,000	Click Here View Sample Site
Asthma	$2.29	1,500,000	Click Here View Sample Site
Law of Attraction	$1.13	246,000	Click Here View Sample Site
Autism	$1.49	2,240,000	Click Here View Sample Site
Auto Sound System	$2.00	40,000	Click Here View Sample Site
Baby Shower	$1.09	4,000,000	Click Here View Sample Site
Back to School	$1.08	450,000	Click Here View Sample Site
Barbados	$2.08	1,220,000	Click Here View Sample Site
BBQ	$1.05	6,120,000	Click Here View Sample Site
Beach Vacation	$2.23	1,830,000	Click Here View Sample Site
Beauty	$1.51	20,400,000	Click Here View Sample Site
Business Networking	$4.00	335,000	Click Here View Sample Site
Bonsai	$0.47	1,000,000	Click Here View Sample Site
Bowling	$1.15	7,400,000	Click Here View Sample Site
Boxing	$0.78	5,000,000	Click Here View Sample Site
Braces	$2.31	1,500,000	Click Here View Sample Site
Branding	$3.04	550,000	Click Here View Sample Site
Bridal Shower	$0.89	1,500,000	Click Here View Sample Site
Buying a Boat	$1.16	80,000	Click Here View Sample Site
Camping	$1.13	16,600,000	Click Here View Sample Site
Candle	$1.21	6,120,000	Click Here View Sample Site
Cashmere	$1.62	1,000,000	Click Here View Sample Site
Catfishing	$0.31	165,000	Click Here View Sample Site
Cats	$0.79	11,100,000	Click Here View Sample Site
Cellulite	$2.86	1,000,000	Click Here View Sample Site
Chiropractors	$2.10	1,000,000	Click Here View Sample Site
Chitosan	$0.92	74,000	Click Here View Sample Site
Closet Organizers	$6.32	135,000	Click Here View Sample Site
College Scholarships	$2.87	368,000	Click Here View Sample Site
Computer Training	$5.47	450,000	Click Here View Sample Site
Credit Score	$10.83	1,500,000	Click Here View Sample Site
Cruises	$3.83	7,500,000	Click Here View Sample Site
Debt Consolidation	$19.53	1,500,000	Click Here View Sample Site
Dirt Biking	$0.63	33,100	Click Here View Sample Site
Distance Learning	$5.59	1,000,000	Click Here View Sample Site
Dogs	$0.75	30,400,000	Click Here View Sample Site
Domain Names	$15.36	550,000	Click Here View Sample Site
E-mail Marketing	$9.42	40,500	Click Here View Sample Site
Embroidery	$1.70	2,740,000	Click Here View Sample Site
Equity Loans	$14.57	6,120,000	Click Here View Sample Site
Family Travel	$2.11	301,000	Click Here View Sample Site
Fashion	$0.88	24,900,000	Click Here View Sample Site
Feng Shui	$0.74	670,000	Click Here View Sample Site
Find People	$0.80	1,000,000	Click Here View Sample Site
Fruit Trees	$0.79	200,000	Click Here View Sample Site
Furniture	$1.53	101,000,000	Click Here View Sample Site
Garage Sale	$0.69	450,000	Click Here View Sample Site
Garden Furniture			Click Here View Sample Site
Genealogy			Click Here View Sample Site
Generators			Click Here View Sample Site
Glassware			Click Here View Sample Site
Golden Retrievers			Click Here View Sample Site
Golf			Click Here View Sample Site
Golf Clubs			Click Here View Sample Site
Gourmet			Click Here View Sample Site
Government Grants			Click Here View Sample Site
Grand Cayman			Click Here View Sample Site
Gum Disease			Click Here View Sample Site
Hard Drive Data Loss and Recovery			Click Here View Sample Site
HDTV			Click Here View Sample Site
Health and Fitness			Click Here View Sample Site
Herbs and Health Benefits			Click Here View Sample Site
Home Safety			Click Here View Sample Site
Hybrid Cars			Click Here View Sample Site
Ice Fishing			Click Here View Sample Site
Indianapolis 500			Click Here View Sample Site
IPod			Click Here View Sample Site
Vacation in Italy			Click Here View Sample Site
Job Interviews			Click Here View Sample Site
Kitchen Remodeling			Click Here View Sample Site
Koi			Click Here View Sample Site
Laptops			Click Here View Sample Site
Las Vegas			Click Here View Sample Site
Law of Attraction			Click Here View Sample Site
Liposuction			Click Here View Sample Site
London			Click Here View Sample Site
Low Cholesterol			Click Here View Sample Site
Magic Tricks			Click Here View Sample Site
Martial Arts			Click Here View Sample Site
Metal Detectors			Click Here View Sample Site
Mosquito Repellant			Click Here View Sample Site
Motorcycles			Click Here View Sample Site
MySpace			Click Here View Sample Site
Mystery Shoppers			Click Here View Sample Site
Nascar			Click Here View Sample Site
Nurse Assistant			Click Here View Sample Site
Office Chairs			Click Here View Sample Site
Parasailing			Click Here View Sample Site
Parenting			Click Here View Sample Site
Penny Stocks			Click Here View Sample Site
People			Click Here View Sample Site
Personal Loan			Click Here View Sample Site
PH Miracle Diet			Click Here View Sample Site
Photography			Click Here View Sample Site
Podcast			Click Here View Sample Site
Pool Accessories			Click Here View Sample Site
PS3			Click Here View Sample Site
Rollerblading			Click Here View Sample Site
Running			Click Here View Sample Site
Salmon			Click Here View Sample Site
San Diego			Click Here View Sample Site
Satellite			Click Here View Sample Site
Saw Palmetto			Click Here View Sample Site
Scrapbook			Click Here View Sample Site
Second Income			Click Here View Sample Site
Self Confidence			Click Here View Sample Site
Sell Your House			Click Here View Sample Site
Six Pack Abs			Click Here View Sample Site
Skiing			Click Here View Sample Site
Skydiviing			Click Here View Sample Site
Soccer Tips			Click Here View Sample Site
Social Networking			Click Here View Sample Site
South Beach Diet			Click Here View Sample Site
Speeding Dating			Click Here View Sample Site
Sports Car			Click Here View Sample Site
Spring Break			Click Here View Sample Site
Stress Management			Click Here View Sample Site
Student Loans			Click Here View Sample Site
Study Tips			Click Here View Sample Site
Summer Jobs			Click Here View Sample Site
Summer Vacation			Click Here View Sample Site
Surround Sound			Click Here View Sample Site
Swimming			Click Here View Sample Site
Swimming Pools			Click Here View Sample Site
Tarot Cards			Click Here View Sample Site
Tattoos			Click Here View Sample Site
Tea			Click Here View Sample Site
Television			Click Here View Sample Site
Tennis			Click Here View Sample Site
Tennis			Click Here View Sample Site
Termites			Click Here View Sample Site
Timeshare			Click Here View Sample Site
Vitamins			Click Here View Sample Site
Wart Removal			Click Here View Sample Site
Watches			Click Here View Sample Site
Wedding Favors			Click Here View Sample Site
Wedding Gift			Click Here View Sample Site
Whey			Click Here View Sample Site
XBox 360			Click Here View Sample Site
Yoga			Click Here View Sample Site