[Code] Cocoa (iOS) OpenID client library?

[Devraj Mukherjee]

Hi all,

We are trying to get OpenID on AppEngine to authenticate our users
against various Social services (Facebook, Twitter, etc).

Our project aims to release a native iOS application. Does any one
know of a Cocoa/iOS client library for OpenID.

Or has anyone attempted to write one, and would be willing to share
their experiences? We are wondering since one doesn't exists is it
really a difficult problem to write a native environment library for
OpenID?

Thanks for your time.