Agree with Pesto that the # of MP isn't that important. Unless you're increasing photos to the size of a barn.

I'd look at the features that are important to "YOU". We run 3 cameras and are getting ready to buy the Nikon D200 also. But we have a small Nikon that fits in a pocket that we bought earlier in the year...and runs on the same batteries our other two cameras do. We wanted a small one, that had a viewfinder in it. We have a digital Olmpus SLR (too big for me, my husband uses it) and another Olmpus that is bigger than the little point and shoot Nikon. All were purchased because of the features we liked and wanted and how we wanted to use them. In some situtations we didn't want to drag along a bigger camera...in others we want the best quality, in others we need quick shots. (spot metering, shooting in RAW, a quick shutter, a view finder, the ability to attach a secondary light source, weight, feel when you hold it in your hands--features, features, features) Have fun deciding!