I'm waiting for them to get the 20D bodies in rather than the kits (the kit lens is acrylic and a pos) so I am still using a 10D.
The 24-70L is probably the best all round lens and the majority of my shots have been with it or the 70-200L. My four main lenses are those two, the 50mm 1.4 prime and the Sigma 12-24 wide angle.
24-70L
http://www.pbase.com/shoplifter/image/30588507
http://www.pbase.com/shoplifter/image/31146518
12-24
http://www.pbase.com/shoplifter/image/29841773
70-200L
http://www.pbase.com/shoplifter/image/31162498
http://www.pbase.com/shoplifter/image/30008198
The lens reviews at fredmiranda.com are a must see reference:
http://www.fredmiranda.com/reviews/
The 10D is an amazing camera, I can't wait to get my hands on a 20D.