If you haven't heard of Ken Rockwell and you are interested in photography, you don't know what you're missing! Here's a link to "Your camera doesn't matter" that I feel anyone interested in great pictures (anything from a disposable point and shoot all the way to the owner of a 4X5 view camera) will enjoy. It's long, but a very good read.
Ken also has great reviews on cameras and lenses. Be sure to check out his entire site here.