I'm weird with resolutions, I'm not big on giant PPI numbers and large resolutions. For me on a 15"
1280x800, 1280x1024 (Works fine, good for just about anything as long as you have a external for photoshop etc, this is what my PowerBook has well close enough [1280x856])
1440x900, 1450x900(Probably my favorite resolution for a 15", it strikes a balance, but I certainly don't need it, and if it costs extra, I wouldn't pay for it)
1680x1050, 1600x1200 (Way too much, I don't need something with that kind of resolution, all current web browsers have something called tabs. Not to mention enhancements in GUI's in the last 5 years or so. I can just open another desktop or use something along the lines of Shift+Tab to switch windows)
I don't like Widescreens that much though, oh well, not much I can do except hold onto the 12" PB and the IBM ThinkPads.