But, here’s the rub: rather than using data that’s already on the web, everyone that wants to play Facebook’s game needs to go and retrofit their pages to include these new metadata types. While they’re busy with that (it should take a few minutes at most, really), is it at all likely that they won’talso implement support for Facebook’s Like button? Isn’t that the motivation for supporting the Open Graph Protocol in the first place?
Here’s the rub though: those Like buttons only work against Facebook. I can’t just be signed in to any social web provider… it’s got to be Facebook. And on top of that, whenever I “like” something, I’m sending a signal back to Facebook that gets recorded on both my profile, and in my activity stream.