SparkFun sells the bits to build stuff in electronics. It's really a cool store if you are DIY freak.
Updated with other great stores in US & India
USA :
www.fungizmos.com
www.adafruit.com
www.liquidware.com
www.moderndevice.com
www.makershed.com
www.goldmine-elec.com
India :
www.rhydolabz.com
