Yes, I would like to take pictures while riding. I have the MS50 coming up on June 1 and want pictures of my brother and cousin while their riding. I'm sure there will also be times when I see a cool house or something that catches my interest and need to be able to whip the camera out and fire off a (relatively) quick shot.

Zen, think Best Buy will let me ride my bike around the store to test the autofocus speed? That's what I meant by comparing the specs to people's real-world experiences. I do plan on going to the store, though, just to see how things feel in my hands and to play around with the menus.