More Arduino project ideas

Control Speed of a motor http://www.youtube.com/watch?v=Ck7q8RvxnwM

Simple Arduino Robot http://letsmakerobots.com/node/2164

Robot http://luckylarry.co.uk/arduino-projects/obstacle-avoidance-robot-build-your-own-larrybot/

Counter http://www.instructables.com/id/Arduino-XMAS-hitcounter/

Tone Player http://ashishware.com/ardno_melody.shtml