I'm on my 3rd Canon DSLR (original Rebel, Rebel XT and now T2i). Here's some ideas I'd like to see Canon add to to their cameras. Some of these are software-only:
1. A "automatically take all bracket photos" mode. I think the camera would be better than I am at snapping 3 quick photos for the bracket (the iPhone 4 does this for its HDR), this would further reduce bounce/misalignment when trying to do brackets without a tripod.
2. Better organization for photos on the card. In particular, I'd love organization by date (e.g. DCIM -> 168CANON -> 13Feb11 -> photos)
3. 'digital levels' across the camera range. I find that I routinely hold the camera about -5 degrees if I'm not paying very careful attention.
What other features would people like to suggest to Canon?