The colemak homepage currently scores:

2/5 stars from stumble upon
9 reviews from stumble upon
7 Thumbs up from stumble upon
https://www.stumbleupon.com/url/colemak.com/

13 Diggs from Digg.com
2 Comments from digg.com
http://digg.com/tech_news/Colemak_keybo … ive_layout

Bookmarked by 123 people in del.icio.us
http://del.icio.us/search/?fr=del_icio_ … k&type=all
(A couple other pages from colemak.com are in there as well)

Not in furl: (but the "Learn" page is... but barely)

Mentioned once in the slashdot forum... comes up as the 3rd result on a google search...
http://ask.slashdot.org/article.pl?sid=05/12/18/1459231

Feel free to chime in and post statistics from your own favorite social network