potentialgeek - 5:50 pm on Jun 24, 2011 (gmt 0)
I've seen a site with the most Likes in the sector get partly Pandalized. Not sure it has much SEO value. The fact that Google has been late to even refer to Likes as a possible signal for their algo suggests they don't put too much weight on them. There are so many other ways to figure out value and ranking.
But some sites after Google's mere mention of Likes have gone crazy with them, including eBay. Every product gets a Like button. So far I haven't seen one product Liked. I still find the Like button goofy and haven't implemented it on any of my sites. It's clutter.