the dot-communist: "...aside from the sheer intimidation factor that the Liberty spec has, I'm sure there are other reasons I'm missing that it doesn't apply to the blog world. I guess."
I'm not actually sure that there are any good reasons why it doesn't apply to the weblog world. I mean, why does someone need three userids just to use Technorati, post to their Blogger weblog and leave comments on a Blogware powered weblog?
Suspicion: Its early enough in the game that every app developer that relies on userids is confident that their implementation is scales suitably for their needs.
Theory: It probably isn't.