We still have a Lite version of the app which supports collaborative code editing and video chat, while the full version has live code execution and a shared Linux terminal too.
Would love to hear your feedback.
Our current tool of choice is GoToMeeting, mostly because it offers video/audio chat, screen sharing, keyboard sharing. Most importantly, GoToMeeting seems to consume least amount of bandwidth, which makes is more reliable for interviewing candidates w/ slower Internet connections. The main problem with GoToMeeting is that it's clunky, and the licensing options are a pain in the butt. It's not uncommon for one interviewer to log in w/ the credentials we use, only to kick out another interviewer. Scheduling is kind of a pain in the butt, too.
I'm going to recommend we try out Codassium. I've played with it a little bit, and it looks awesome so far. I have one feature request that would be awesome for us. Give users the ability to set the resolution for the webcam image. When audio & video become choppy, allowing someone to use a lower resolution could mean the difference between completing or having to reschedule the interview. How well you manage bandwidth could also mean the difference between winning & keeping us as a customer :)