i see a site that used a plugin that user can like the photo to facebook
we have a plugin for share photo in facebook but this like a photo
you can see it in this url
http://1x.com/photos/abstract/37853/
Check threads at the top here, theres an ongoing one discussing this.. I modified the Share on Facebook plugin to show my Like button....but really looking at the google code, it can be implemented anywhere and really doesn't require a plugin.
facebook code I mean, not google :p sorry, working on too many things at once heh.