Hmmm. In that price range (~$225USD), pretty much any model you buy will be about the same. The only standout, from a quicky check, would be the Canon SD880IS if only for the IS feature. The nice thing about both, to me, is that they go to 28mm on the wide end. Great for scenics and ride shots. Neither has a far reach (110mm or so - and forget digital zoom).
I think the limitation here is your price range. Monty's 570 runs ~$375USD. If you could spring for that much you have many more options. Personally, I would normally suggest something with as large a sensor as possible (max image quality and PP flexibility) but those are hard to find in a P&S nowadays for under 400 (Canon G10 rules here).
What are your criteria? If one is "fit in a shirt pocket" go with the Nikon you spec or the Canon 880. If you don't mind carrying something, however small, around your neck, or in an extra small camera bag, the 570 wouldn't be bad. But I'd also suggest looking at the Canon SX10IS or a Nikon P80/P90. And don't forget to factor in costs for an extra bat and some mem cards in your total spend.
