Gates Says Microsoft Will Support OpenID
An anonymous reader writes "In his RSA conference keynote today, Bill Gates announced that Microsoft will support the decentralized OpenID digital identity protocol, in addition to WS-* and CardSpace (transcribed notes, video). From its roots in LID, i-names, and Sxip, the first major deployment in LiveJournal, and now with support from Techorati, Magnolia, Symantec, a suspected mass-deployment by AOL, and a number of startups — using URLs as digital identities has caught hold."
It's a two way thing; OpenID will support CardSpace as an identity selector. This is a "good thing", as it will stop the man in the middle attacks OpenID is very prone to. Of course the OpenID identity providers need to add support, like MEX endpoints and WS-Trust, which are all open specs.
CardSpace itself doesn't care what's on the identity provider side, they just need to talk the right talk.
OpenID is not intended to establish trust or prevent comment spam. It's just there to guarantee to a participating site that the "identity" URL it's been given is indeed owned by the user (agent) presenting it. It doesn't even guarantee to a visitor that the comment they're reading was actually posted by the person it says it was posted by, because that would require that the visitor trust the participating site.
All of these FAQs and more are addressed on the OpenID site linked in the article summary.