Some of us value the ability to hack in bed over the extra screen real estate.

I concur. I can't believe how many single monitor setups there are.

I am also surprised that more people don't use split screen setups where they can view multiple pages of code within the same window (ala emacs,gvim, Visual Studio). I prefer to have around four but atleast two views of code open at once.

Screen real estate is like a drug. Addiction creeps up on you quickly, and the more you have the more you think you need. I used to be perfectly content with one 17" monitor. Now I'm looking for a bigger desk so that I can add a fourth 22" LCD.

A fourth?

Wow. That's awesome.

I've tried working on multiple monitors, several times. It doesn't work for me.

Just curious, but what doesn't work for you about multiple monitors?

I'd be interested to hear why as well.

I find it's invaluable as you can have a web browser on one side and your code on the other.

I tried it and it made my neck hurt. I prefer a virtual desktop if I want multiple workspaces. Why move your head when you can make the screen move for you?