Well, I've had the Rebel XT for a week now, and it's a great camera. Considering what I sold my d60 for, the price of the upgrade was well worth it.
Fit and finish wise, it's a bit cheaper, but the plastic is solid and doesn't give me any doubts about how long it'll last.
Speed wise it's amazing. Paired with a fast cf card, I can keep shooting jpgs at 3fps for 30 frames. Raw I get maybe half that, but it's really sufficient. 5fps might be nice, but I can't imagine where I'd miss a shot because of it. The real improvement here is that the camera can write to the CF card no matter what else it's doing. With the d60, you had to take your finger all the way off the shutter release to let it write to the card.
The autofocus is improved. The addional sensors are nice to have there, they've made me consider using ai focus, though I'm not sure if I actually will.
The low light performance is much better, iso1600 is much more useable and while you can see the difference you have to look for it where with the d60 you could tell that you were shooting on iso1600 just by the picture.
I havn't noticed the 2 megapixels outside of the raw files being 2 megs larger.
My main concern was the menuization of a lot of the controls, but it really hasn't seemed to slow me down. All the directional arrows work as shortcuts into the menu system, so some things are even faster than they were on the d60.
I'd highly reccomend the camera to anyone in the market for a real camera. The 20D is better, but I don't think it justifies to price differential at the moment. Of course, this all depends on what value you place on money.
Matthew