I’ve been playing around with Facebook’s “I like this” or, if you prefer, “I recommend this” button and have manually implemented it on top of some posts like this one. I also checked out all the other new Social Graph related features that Facebook added.
Indeed, manually, because although the blog platform I use, TypePad, was the first in the “Like” button program, it hasn’t really done spectacular things with it yet but, then again, it's all so new.
You can add a “Like” or "Recommend" button for your blog in general via TypePad, but as far as I can tell, it’s impossible on a post basis, unless you have access to the source code of TypePad.