OpenID alternative for MSN

Question

I want to support login with an MSN account but MSN doesn't support OpenID. Wikipedia says "Windows CardSpace (codenamed InfoCard), is Microsoft's now-canceled client software for the Identity Metasystem." So what is the alternative to OpenID for MSN?

Answer 1

LiveConnect

http://msdn.microsoft.com/en-us/live/hh561433

Answer 2

This may answer your question:

Windows Live supports Open ID

I believe any MSN account is already Windows Live