So, now that I've had a brief bit of serial enthusiasm in discovering this whole microID / claimID thing, all it's ended up with in practical terms is a list of links in my sidebar. So, with that and fully understanding that it's early days yet for claimID, I have to ask myself: What does this do that I couldn't have done with a tagged set of del.icio.us bookmarks? Of course, bookmarks on del.icio.us don't enjoy any sort of microID verification, but that could change - either through features implemented there directly or through a sidecar service. My original gripe was about both machines and people finding out about me from a central source. So far claimID seems to be good for just people finding out about me.
By the way, this is not criticism or a put-down of claimID - this is me thinking out loud and puzzling it out.
Update: Although, I certainly understand the utility of microID in replacing blog posts like this one.