Wow ok this thread of mine has derailed so badly but anyways
Been playing around with the 7D, and I'm loving it. Compared to the 450D, it's blazing fast... but I'm sure the CF Extreme Pro card is making a difference too (the 8fps continous shots were done with the 60MBps card), having the 50% speed increase over the regular model. <-- I did a little test on high-speed continuous and it did over 100 shots without filling up the buffer for jpeg shots at 18MP. Even Jpeg+RAW together is still very fast.
Autofocus on the camera is awesome, but I'm a manual focus nut, and the larger viewfinder is pretty useful in that regard.