OpenID, the lightweight, decentralized identity system (Radar post) had an interesting weekend. There is now a method for using your Yahoo ID with OpenID (unofficial, but sanctioned) and there are new measures designed to reduce the risk of phishing.
First, ex-Yahoo Simon Willison has created a proxy to allow you to use your Yahoo Id as an OpenID.
idproxy.net, launched is an attempt at speeding up the process. It uses Yahoo!’s Browser-Based Authentication API to allow you to sign in with a Yahoo! account, then lets you create one or more OpenIDs (of the form something.idproxy.net) to use with sites that support the OpenID standard.
In effect, it lets you use your Yahoo! account as an OpenID.
More about this
http://radar.oreilly.com/archives/2007/01/openid_get_it_f.html