It's still in alpha stage. Don't expect too many options just yet. The devs are planning to include chat stuff later on.
And the other dudes who did the tunneling for Halo back in the day are jumping up and starting the same thing for the GC.
http://www.planetgamecube.com/news.cfm?action=item&id=4809
Whichever software gives me a better gaming experience, that's what I'll use.