DataPortability - The technologies already exist, we simply need a complete reference design to put the pieces together.
WS-I.org - WS-I delivers practical guidance, best practices and resources for developing interoperable Web services solutions.
Separately, Data Portability's Technical Blueprint is further along than than its Policy Blueprint sister.
Making data portable is easy. Making identity data portable isn't. Specifying how to do so without simultaneously determining the social, legislative, and legal issues that will constrain such portability is risky.
The Liberty Alliance has made lots of mistakes over the years. But we didn't make that one.