CardSpace InformationCard Extension for FireFox
There's been work by Chuck Mortimore to implement the complete stack without .NET 3.0:
Chuck Mortimore, with great diligence, has begun work on the first true, cross-platform extension for FireFox to enable interoperatability with CardSpace, and the Identity Metasystem. He's made some fantastic progress in getting FireFox up to par with that. The only down side is, that Managed Cards may take some serious, significant effort to implement. And, what if one actually wanted to use the Windows CardSpace identity selector, but from FireFox?
This extension, however, enables the Windows CardSpace identity selector. As we talked about in a recent podcast, the CardSpace system at a protocol level doesn't require Windows or .NET 3.0. There will likely emerge complete stacks, server and client, that include identity selectors for Linux and Mac, and of course, Windows. Here's a Java-based Relying Party and sample Identity Selector from Chuck.
Kevin's extension also supports extension (ha) as well, as a generic identity selector, so when other selectors come out, they can be hooked into his FireFox XPI-based extension. Be sure to watch his site in the coming weeks as he'll be releasing more code and samples. Also, be sure to read these (PDF) Slides on the Mono Infocard Project.