Like Chime, it would seem I'm in the minority as well running Windows Vista 64 on my home setup. I don't follow any sort of pattern on what goes on what display, it just all depends on what I'm doing at the moment. Currently, however, I've got Chrome in the center, communications (TweetDeck, Digsby) on the left and Visual Studio on the right. Behind those are just a couple more windows such as Notepad++, another copy of VS running for an alternate project and I'll usually have SQL Management Studio up as well and maybe iTunes unless I'm listening to Pandora.
The laptop is rarely used, but I'm working on a Chrome Extension that requires syncing via a website across computers so I broke it out for testing.
The rig is a couple of years old now, nothing really note worthy aside from maybe my system drive and data drive's each being in a mirror raid. Screens are all Hanns-G. I had 2 - 19's and a 21, but one of the 19's fried and I managed to find a used 21 on eBay to match my existing one (it's an older model) so I picked that up.
http://lh5.ggpht.com/_COmDbqgGAv8/S94JeAQ-CkI/AAAAAAAAEoM/GJ... (picasa web)