We have recently been looking at integrating a lot of features from Windows Live into various websites.

It's pleasing to be able to report that LiveId has signed up to the OpenID protocol. Not exactly breaking news, but certainly something that makes us feel comfortable with continuing to push Live Services. What this means is that at some point in the future, you could have one ID (as long as your ID provider has signed up to the OpenID protocol) this allows you to login to any website using your one ID. Imagine having ONE login for ALL the websites you visit - sounds simple - but it'll probably take a few years to get off the ground.

Have a read about what this means http://dev.live.com/blogs/devlive/archive/2008/10/27/421.aspx