For any of your readers that would like to accept OpenID on your website to facilitate registration, login, and building rich user profiles, check out the resources at the OpenID Foundation website: http://openid.net/add-openid/add-getting-started/
For anyone looking for a turnkey managed solution that includes not only OpenID but also Facebook, MySpace, Hotmail, Windows LiveID, Twitter, etc., check out JanRain's RPX - http://rpxnow.com and the social publishing capabilities https://rpxnow.com/demo/social to let your site users share their activitie with friends on Facebook, Yahoo, Twitter, and MySpace.
