I just acquired a Neato XV-14 Robot Vacuum Cleaner for $50. It's owner was dissatisfied that it could not return to base from another room... I tried to discuss infrared "line-of-sight".... then thought ... "shut-up dude, he wants to sell it!!!"
I offered $50... and voila... one fully functional Neato XV14 in my posession...
I've looked at https://www.robotshop.com/letsmakerobots/node/37592 and like most of this idea. I've got a XBOX Kinect instead of the Asus Xtion. I've got a 7" el-cheapo Android with wifi/bluetooth and front and rear cameras...
I haven't picked a main processor yet, but don't think the RaspPi is up to this task...
Before I start into yet another crazy project, I'm looking for ideas... My first thought was using it as the base of a telepresence bot...
I'm looking for suggestions... nothing is off the table at this point in time.