AnandTech has published a review of Canon's new Rebel XSi (EOS 450D in Europe) dSLR camera. The new model features a bit more megapixels, a larger LCD display, Live View and a better kit lens with optical stabilization.
The XSi is 2.5mm wider and 3.3mm taller than the XTi. However, it is 3.1mm less deep and 35g lighter than the current XTi. The overall impression is the XSi is slightly larger than the XTi, and it is surprisingly light. The rubber grip cover is now more "texturized" with subtle changes to the shutter release depression and angle. The grip is more comfortable to hold for larger hands (still improved by adding the grip), but it is a good fit for smaller hands.
Build quality seems a cut above earlier Rebels and the appearance is definitely classier and more in keeping with the rest of the Canon DSLR line. The XSi has been described as looking like a mini 40D and that is an apt description. The XSi is also the most rugged Digital Rebel ever built with a stainless-steel chassis and a glass-reinforced engineering plastics body.
The reviewer concludes the XSi is the best of the crop of "entry" dSLR cameras and believes it's the best "entry" Canon ever produced. I picked up a EOS 450D myself a couple of weeks ago and I'm pretty satisfied with the camera.