I've posted mine before but in stories that didn't get many views. Putting up a build log has been on my todo list forever...

Mine is based on the Asterisk open source pbx and a Grandstream video phone for the real-time 2 way video. It is controlled via DTMF and doesn't require a computer to operate, just a phone. Full telepresence if your phone is a SIP phone that does video.

Also cost about $500 to build but probably took me much longer as I built my own drive system and motor controllers.

Here's a video of my homebuilt telepresence bot in action : http://www.youtube.com/watch?v=uMZkd8YMgzw

For what its worth, I don't consider hacks like these "Anybots killers", more like homage to heroes of mine. I'm a big fan of TB and the Anybots team and can't wait to see what they come up with next.