Windows LiveID supports Information Cards / Windows CardSpace - Let´s rock
Since month we get an interesting question: "When will LiveID support Windows CardSpace?". Answer: "Shortly".
So, shortly is now :-)
Since some hours you can use (beta) an information card to sign in Windows Live ID:
You could use a Personal Card to enhance your existing user account. So just go to:
http://login.live.com/wlogin.srf?appid=0016000080002409&alg=wsignin1.0&appctx=%2fDefault.aspx
and try it out :-) You are just one click away to feel the next footstep inside the ecosystem!