Camera stuff

http://www.dpreview.com/
They have excellent reviews of almost every digital camera. You can compare specs on any combination of cameras you want. They take very similar test shots with every comera so you can compare actual pictures taken of the same shot to compare what all the specs actually mean in the real world. There are also some excellent forums there.
http://www.fredmiranda.com
There are reviews there on lenses and cameras by people who own them. Very useful to read actual users impressions.
http://www.robgalbraith.com
Has a really good section on memory card and the speeds they write at on different cameras. Good to check out before getting a card so that you get the one that is fastest on you type of camera.