I'm surprised nobody mentioned cell phone cameras. If you ride with a cell phone you may want to look into upgrading. My Motorola Droid X is an 8 Megapixel Camera with HD video capability. It takes great outdoor photos. Since getting this phone I found no need to carry an additional camera even though I have several to choose from.
The only negative I found is the CCD in this phone doesn't take good interior or very low light conditions as well as my Sony camera.

Edit- I forgot this is the touring forum. A smartphone might not be the best chioce if you will be away from electrical power for more than a couple of days.