A `links' page seems to be de rigueur, so here are a few.  These are in alphabetical order.

Adorama (photo stuff)
B&H Photo (note, check for used stuff)
currentenergy.gov: electricity graphs
Darren Provine (`kilroy')
Google Search
photo.net -- more info on photography than you can shake a tripod at
Sunrise/sunset/moon calculator
Teslamania - Bert Hickman
Weather Underground
Yahoo! Finance