Two recent magazine articles compare the following digital SLRs:

Canon 20D
Canon Digital Rebel
Fuji FinePix S3 Pro
Konica Minolta Maxxum 7D (Dynax 7D in the U.K.)
Nikon D70
Nikon D100
Olympus E-1
Olympus Evolt E-300
Pentax *ist DS
Sigma SD10

Get a summary of the results and some recommendations here.