Over the years, Canon has been very good about not leaking new camera specs. Now, thanks to Amazon.com there is a major leak on the 40d. Amazon has removed the info from thier site, but you can find it at engadget.com
10.1 megapixel
self cleaning sensor
6.5 frames per second
sRAW option 1/2 size raw file
available Sept 20th
etc

edit: darn it noahnott beat me to the news scoup. I guess I need to learn how to post faster.