Roborodentia 2009 rules from the IEEE Computer Society - official rules
Robot Resources
RobotMarketplace - motors, speed controllers, gears
Sparkfun - all kinds of development boards and sensors
Pololu - good for all kinds of robot parts
Solarbotics - more robot parts
Electronic Goldmine -
surplus parts, very good prices
Budget Robotics - robot
parts including modified servos
Jameco - electronic parts store
Mouser - electronic parts store
Digikey - electronic parts store
All Electronics - good
surplus electronics store
Small Parts - various raw materials, fittings, connectors
Robot Store - a robot website run by Jameco
Surplus Center - random hardware
You can use a modified R/C servo for a drive motor. Using a servo
can eliminate the need for an H-bridge. You only need to send a
1-2 ms pulse from a digital output to control the servo. There
are many webpages
on how to modify an R/C servo. Here is one link.