http://www.dpreview.com/ is probably the best review site for the pro/prosumer digital camera market- they go into great detail (10+ pages) on cameras that have been around for a while and still give excellent reviews on new released cameras.
http://www.cameralabs.com/ is also very good, very detailed consistent reviews aimed more at the advanced amateur market.
After months of research I've actually decided away from buying a DSLR as my next camera, think I'll go for a top-end compact instead: either the Ricoh GR Digital III, Canon PowerShot G11 (drool) or maybe the Panasonic Lumix DMC-LX3. The reality is I use my camera mostly for photographing materials for using as render textures so I need to be able to have it with me most of the time and for architectural photography used with a tripod so I don't need the ultra-low-noise large or full-format sensors which DSLRs offer. At "normal" light levels any of the above cameras will produce results as good as the lower end prosumer DSLRs so they only trade-off is not being able to upgrade lenses in the future. The brand new Canon PowerShot G11 is said to have much improved light-sensitivity; equivalent to 2 stops, which is very impressive. These compacts (which many journalism photographers carry as a backup) are generally more robust too. They're definitely a serious alternative to lower-end DSLRs.