Robot Ideas.. Hummer RC/ Mini-itx / Serial

Brain: I'm thinking of an epia TC6000E it has a DC-DC controller. and I can run it off a cf card (not much memory) and add a wireless card to
control this robot through the web: (as well as have some programming)
Body: I'm thinking for a body one of those Hummer H2's from walmart.. really large (enough for my mini-itx)
this one is pretty cool there's room inside for it: 3160&type=5&deptA71&path=0%3A4171%3A4199%3A133160
this second one has 19V battery which means it's pretty strong.. strong enough to carry the minititx. 3160&type=5&deptA71&path=0%3A4171%3A4199%3A133160
(I have one of Acromnames gp 1.0 motorminds too i can delegate some of the driving to )
Control: Ideally i'd like to control front/reverse and direction using a dual H-bridge (dual H-bridge) and a serial port.
looked at the Motor mind B/C but not sure exactly how to get those working on com pots..
any suggestions for hardware and software would be appreciated.
planning on using this robot to chase after the dog while i'm at work :) thus adding a webcam and web control :)
hopefully u guys can help me put the hardware together
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