Not sure how accurate the features list is since Canon hasn't officially announced it yet, but Amazon "accidently" listed the 40D for preordering this week. It was quickly brought down, but by then people and quoted and screen captured the page:
Screen cap:
http://buttonjam.smugmug.com/photos/185486084-O.jpg
Feature-wise, it's quite a step up from the 20D and 30D (aka 20D MkII) and even inherits a few things from the pro bodies. A couple things that caught my eye:
- I'm particularly interested in how the colour will look now with the 14-bit A/D conversion
- Auto ISO
- Wireless capability (though it requires the wireless add-on)
- ISO in the viewfinder (about time!)
- Highlight Tone Priority
- Replaceable focus screens
- Improved AF
- Bigger VF
They've even added IS and USM to (what is presumably) the kit lens:
http://www.amazon.com/Canon-EF-S-18-...7532438&sr=8-1