Digital Grin is forums from the SmugMug developers which has some general forums and some smugmug forums.

Here is a great tool for uploading to smugmug.

Great reading for understanding f/stops and shutter speeds.

The Canon Digital Learning Center @ photoworkshop.com has some nice looking interactive Canon EOS guides.

Good overview of lense types here.

Great article in pdf about sensor cleaning for the 20D. Taken from a great source of technical articles.

If I buy another strap on my camera I would probably choose this from Op/tech.

A short guide in using monopod, could be usefull if I buy a monopod for the travel from Moskva to Bejing this summer.

Forum discussion about which photographers do people admire ... I'm planning to find some favorite photographer to study more but haven't found anybody yet.

Very good monthly articles by Alain Briot called Briots View on Luminous-Landscape.

My collegue Búrkni was asking me about high performance multi layered, super zoom camera for idiots and I recommend these: Check it!

Good tutorials on digital Photography on Cambridge in Colour.