sageshilling

Like Cheese provides a number and an image of a heart beneath site images; 
hover on the number to see the display names of past visitors that liked the image. 
Visitors can register like/unlike your site images; heart image changes accordingly. 
Uses Nextend-Facebook-Connect to allow for easy Facebook login and gain approved valuable site visitor information. 
Provides additonal image fields in the media uploader.
demo <a href="http://peaceoftheocean.com/shesellsseashells" rel="nofollow ugc">http://peaceoftheocean.com/shesellsseashells</a> 
<a href="http://www.orcawebperformance.com/like-cheese-a-wordpress-plugin/" rel="nofollow ugc">http://www.orcawebperformance.com/like-cheese-a-wordpress-plugin/</a>
*currently this version allows for adding likes to posts 
*3.0 coming soon to allow for gallery image likes, shortcodes

Like Cheese

Like Cheese lets your site visitors 'like' your site images.

Scott Basgaard

P2 Likes brings Facebook-like functionality to your P2 site. Your users can now show interest in threads by clicking the like button.

P2 Likes

Works just fine on latest WordPress, even under Mercury child theme, although I'll have to do some styling for the avatars of those who liked a post or comment (they get slightly cropped on the right side).

Nice!

Give positive feedback on threads you care about on P2

Like Cheese vs P2 Likes