I don't know how many people here shoot tethered (hooked directly to a computer while shooting) but if you have Vista 64 bit and try to use the Canon EOS utility you're going to have nightmares for problems and still may not get that combo to work.

I should know, I specifically bought a laptop for shooting tethered, got a good fast machine, which apparently comes with Vista 64 bit. I did not know at the time that there was a difference until I tried to hook the camera up. I can get it to run sporratically (sp?) but not consistently or without a HUGE headache and ALOT of wasted time. Apparently at this point Canon does not seem to support the Vista 64 bit machines, at least for the EOS utility (other parts of the software run fine). Many sites I've read says that the 32 bit Vista seems to not have nearly so many problems.

Just be warned, and this is coming from a longtime Canon fan (not so much now for software) and a newly emerged Vista/Microsoft hater. lol