I've got two Apple 30: displays--one at home and one in my office at BYU. They're lovely. I can't imagine programming without one. All that real estate makes a huge difference in productivity.
Last week I picked up three Dell 3007WFP 30 inch monitors. They're a steal; Dell has them priced less than $1200 (compare that to the Apple educational price of $1600). A c|net head to head review puts them neck and neck. I'm sure the esthetics won't be the same, but I can live with that.
Why the price drop? Dell's got a new 30 inch display on the way. The chief benefit is better connectivity which isn't something I've cared about--I'm not going to use these for TVs.
If you've always wanted a huge display, this may be your chance.