I Selected Play by Instant Messenger, largely because it's the only one I actually have experience with. My gaming group from home and I kept our game alive for quite a while with me teleconferenced in via IM. We'd probably still be doing that now, but the time difference makes things rough to plan around kids activities. I'm really looking forward to trying Ghost Orb though, it sounds good. I'd like to try a lot of the others too though after reading this thread.