There have been quite a number of online discussions on the differences between film & digital cameras and, indeed, the similarities. Most commentators who use DSLRs bemoan the lack of original thinking in layout or function. They seem to be just film cameras with a sensor. I'd tend to agree.
Reading the recent review of the Olympus E-510 at dpreview, I realised that there is another mode that would be really useful: focus brackets, especially if used with exposure brackets. Here's how it would work:1. preset the focus points manually with a "record" button (i.e. focus, record point, do next)
2. switch to shooting mode
3. Fire off the bracket. may 3 or 5 brackets.
This means you can stick to optimal aperture (around f/8) and still get large DoF. Even better would be in-camera blending.
Combine with exposure brackets for an automatic 9-shot sequence. Use a timer remote release, as I do, and you can leave the set-up to it's own devices. gives possibility of HDR/super-resolution combined with large DoF.
With a little imagination, there's a whole bunch of useful new ways to incorporate technology into cameras, and I'm not talking face recognition.