From <a href="http://www.clickz.com/clickz/news/1691466/100k-sites-like-facebooks-social-plug-ins-pick-up-big-traffic" rel="nofollow">http://www.clickz.com/clickz/news/1691466/100k-sites-like-fa...</a><p>... 50,000 sites had installed the plug-ins, such as the "Like" and "Recommend" buttons.
Here are the four most noteworthy brands mentioned in the blog:<p>- WashingtonPost.com's traffic from Facebook skyrocketed by 290 percent.