Here are the top 10 social bookmarking websites ranked by Alexa Rankings.  In your link building marketing campaign for your mini niche website, each one of your articles should be posted on the top 10 social bookmarking websites.

Top 10 Social Bookmarking Websites

Social Bookmark Website	Social Bookmark URL	PageRank(1 to 10)	Alexa Ranking (As of 7/13/2009)
Digg	http://www.digg.com	8	148
StumbleUpon	http://www.stumbleupon.com	8	406
Reddit	http://reddit.com	8	629
Technorati	http://technorati.com/	9	680
Delicious	http://del.icio.us	8	688
Mixx	http://mixx.com	8	713
Kaboodle	http://www.kaboodle.com/	6	1,167
Mister Wong	http://www.mister-wong.de	8	1,196
Slashdot	http://slashdot.org/	9	1,814
Jumptags.com	http://www.jumptags.com/	6	1,983

Additional Social Bookmarking Websites to Consider

Social Bookmark Website	Social Bookmark URL	PageRank (1 to 10)	Alexa Rank (As of 7/13/2009)
Propeller	http://www.propeller.com/	8	2,212
Diigo	http://www.diigo.com	7	3,137
Newsvine	http://www.newsvine.com/	7	4,104
BlinkList	http://www.blinklist.com	7	5,974
faves.com	http://faves.com	6	6,320
Backflip	http://www.backflip.com	6	10,282
Spurl.net	http://www.spurl.net	6	11,345