My 30" experience
I received my 30" ACD and my Dual 2.5 PowerMac two days ago.
I would echo the comments of others regarding the 30" display. Everytime I come home and sit down at my computer, I just have to laugh. It is so large, I had to raise my chair, otherwise the top of the display was actually too high (initially, I found myself looking up to access the menu bar). It is wide, yes, but the height is what seems so different to me. I also find myself working in "areas" of the screen... like, "I guess I will work on the left side of the display for this project." Of course, for audio editing (which I like to do), the sound wave goes all the way across the screen. So cool.
Someone mentioned the heat issue. I don't think the 30" ACD puts out that much heat, really. It runs remarkably cool, considering how much light it is giving off. The Dual 2.5 box is another story, though...
I ran a pixel checker on the 30". I just had to know! This display has over four million pixels. I found one stuck pixel. Now THAT is some serious engineering. I have previously owned the 22" and 23" ACDs, and they were no where near this good from a pixel perspective.
Finally, this is the first LCD display that I have ever owned where I don't turn the brightness up all the way. It is such a phenomenally bright panel, you can actually nudge the brightness down a couple of notches, particularly if you are in a dark room.
I am truly flabbergasted by the engineering. Unbelievable, really.
Woody