I compared the Digital Rebel with a bunch of other Digital SLRs in a different article. Here now, after a couple of months, my first impressions with the Canon.
I am very impressed with the Digital Rebel XT. It is a very responsive camera that delivers clear shots in most lighting conditions. The autofocus is very precise, battery life outstanding, and the availability of accessories excellent. The only drawback (which is shared by all digital SLRs) is sheer size. You have to be in a photo shoot mode to carry it around with you.