If you are registered, you get access to the members only section, can participate in the buy & sell second hand forum and last but not least you can reserve your preferred username before someone else takes it.
Yesterday I took delivery of a 20D along with the 18-55mm and vertical grip. As a replacement for my D60 first impressions are good. The extra 2 million pixels allows more freedom in cropping images. Auto white balance is getting it right and the time taken to write and retrieve image files is much improved.