Progress is underway to add support for both messaging and display of gamercard information within the XBL Status program.  There are two branches on the Launchpad page – one for each planned feature.  Once stable, they will be combined into the main development branch.

Current development: https://code.launchpad.net/xblstatus

Screenshots

I apologize for the lack of window borders, but I can never seem to take proper screenshots with Compiz enabled.