I just downloaded iRobot from LimeWire lastnight to my computer (it was already in mp4 ipod format), and synced it into my 680. I tried to open it first with TCPMP, and the video came up, but no sound. So, I went into Pics/Videos, and opened it there, and it worked just fine!

I'm playing with the idea of getting Kinoma for all the video stuff, I just don't feel like paying $30 for it right now.