I LOVE my dual monitors at work. I have two 19" flatscreens side by side. I use the left one as my primary, just because I like it that way. As such, I've never had an isue with the start button problem. Normally, I'll have a web page full screen on my right monitor with whatever faq I happen to be referring to at the time, with my actual work on the left. Very handy.

I have a pic of a guy that has some 13 monitors all plugged in and working. I can count several (I think 7) computers pushing it all. He's running a flight sim on it and I'll post it as soon as I can find it.