New To Robotics

[Cuog]

You may want to check out http://robotroom.com this guy competes and runs mini-sumo competitions in the seattle area I think. His site and books have alot of very useful information for building these robotcs completely from scratch

[bear24rw]

As far as making it wireless you should look into hobby controllers

http://www.futaba-rc.com/radios/futj63.html

I have that one and iv been pretty happy with it. It comes with a receiver and batterpack. If you dont know already the receiver will out put PWM (Pulse width modulation) that will control speed controllers that will controller your motors (you can also hook a servo up directy into the receiver)

Good Luck!

If you want a high speed, yet fairly light and small weapon, May I suggest going for a cordless dremel? It's simple to wire one to a speed controller or other power source, and they also come with some nice blade choices, like zip cutters and small endmills.

As far as a driving system, I'd go with a vex tank tread kit, as it's not too expensive, yet it still has decent tourque and grip, as well as the fact that it's more maneuverable than a normal rc car (tank style turning).