small robot for playing with computer vision algorithms

Hi!
I'd like to get a small robot (wheeled or otherwise) with a camera (or two, three, etc) so that I can play around with computer vision
algorithms. If it has additional sensors, that would be great, too. What is the fastest, easiest, cheapest way to do this? I'm not a hardware guy, so I'd like to buy something already built. I also would like it to run on or interface with linux.
Thanks!
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What about a surveyor? I have one of the early SRV1's and it performs quite well although it can be overwhelmed by the big outdoors. The company has gone on to make binocular versions and the user community has adapted the electronics to all sorts of things -- e.g. blimps.
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...
Someone just sent me this info. Availale from Thailand around $40 usd.
http://www.inexglobal.com/products.php?model=relayrover
http://www.youtube.com/watch?v=w_O7lw8EGr0&feature=player_embedded
http://www.inexglobal.com/downloads/RelayRoverE.pdf
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On Tue, 9 Aug 2011, mlm wrote:

WillowGarage.com/turtlebot -- might be out of your price range, though.
BTW: given your linux requirement, you might just hook up a linux box to a web-cam, and start with OpenCV or similar for simple motion tracking ... add an Arduino board and a couple of servos, and you can create a pan-tilt mechanism for your initial experiments ...
HTH, Rob Sciuk
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