My old 19" CRT can run at over 2000, but is only for people who want to be able to see past their nose come their 40th birthday
Personally I've used 1600x1200 on >=19" screens for some years, and love it. Currently my main machine has a 1600x1200 panel using DVI on a 20.3" screen with 16ms response (fastest I could find at the time for the resolution). Tis nice. Especially when you rotate it and use 1200x1600 mode for viewing things like this forum. Tops. Although my laptop knocks out something like 1920x1200 at 15.4" widescreen. You would have thought this would have been too small, but everything is seriously crisp and clear. Plus I'm not Mr Magoo so don't suffer any problems.
As far as I'm concerned I find it hard to program in anything less than 1600x1200. Then again I have had over half a decade to get used to the resolution. This is also in Visual Studio though, so you need a bit more space a lot of the time. Work is kind of annoying (1280x800 or whatever on 17") although at least they upped the specs lately (3Ghz P4 effort) and everything is now in black. Nice.
Cheers
I am 99% probably lying in bed right now... so don't blame me for crappy typing