I just want to add my group's experiences to the pile. We have 2 Linux (Debian stable, Ubuntu 12.04), 2 Windows (XP and 7) and 1 Mac (Really old OSX that doesn't work w/ hangouts or tokbox, so she's sharing a computer with her boyfriend). Our first attempt with tokbox was a disaster. No one could get anything working reliably - audio dropped, video dropped, etc. Google Hangouts, however, was loads better, and has proven to be pretty reliable. I think that continuing to support Tokbox is kind of a waste of time, and the team's efforts could be better spent working on other things. Aside from that, we're really liking Roll20. It's the first VTT we've used that doesn't require Linux users to find a Windows machine, and doesn't suck.
