Ken says you should shoot jpeg while Petteri Sulonen says shoot raw! I can only shoot jpeg at the moment but when I do upgrade I’ll be sure to give my opinion 🙂
Ken also has an extensive Canon 20D vs Nikon D70 test. Considering he’s a huge Nikon fan it’s reasonably balanced! You may find his Canon 20D review useful too. Apparently Nikon lenses can be used on Canon bodies! You need to buy an adaptor though.
And finally, he has a great write-up on batteries. I have several sets of NIMH batteries at home that are getting a bit long in the tooth and not performing as well. He suggests that,
you can easily rejuvenate them by running them through a full discharge-charge cycle a couple of times.
From Better Digital Photography..