OpenID is a great idea. One that just might not work. “This post”:http://miksovsky.blogs.com/flowstate/2007/08/openid-great-id.html does a pretty good job of summarizing some of the problems.

For another example, try logging in to any 37Signals app. I’m reasonably clever but the first few times it took me forever to finally authenticate. Or maybe I’m just not that clever.