I carry a little Nikon Coolpix. This is Rowan's ... mine is a year older and blue.
In addition to a whole lot of other picture taking, I took it with me on our recent 8-month Round The World trip. I was reasonably impressed.
Round The World trip photos:
http://www.flickr.com/photos/machka-...7632796492886/
And I have been able to take photos while riding with it.
For example, this was taken while riding. Probably not ultra-clear when enlarged, but not too bad considering I was cycling when I took it.