Here is a list of robotics online shop to spend your money on:

• Lynxmotion
• Robotshop
• Trossen Robotics

And here are some electronics one:

• Sparkfun
• Dontronics
• Futurlec (Click here to pay in AUD)
• Seeed Studio

The big shops:

• Digikey
• Farnell (but is now called Element14)
• RS

Electronics blog:

• Derek Molloy Electronics
• EEVblog

Parts search:

• Octopart
• FindChips