Dan Web offers his No Shit Guide To Supporting OpenID In Your Applications!  His post starts with a great overview of how the OpenID process works then dives right into a fantastic tutorial of supporting OpenID in your Ruby on Rails apps!

Simon Willison offers a list of Six cool things you can build with OpenID. There sure is a lot of real positive buzz with regards to OpenID. I am really looking forward to being able to use my OpenID account with more and more services. I currently have way to many proprietary accounts and way to many web sites. Having a unified identity that I can use at multiple sites is very appealing.