I've recently started using two screens on my desktop PC, and I must say it's addicting. I have two Dell 1905FP UltraSharp Flat Panel Monitors (recently discontinued). The 1905FP is an Active
Matrix TFT LCD with a maximum resolution of 1280x1024 pixels (which is what I run it at). With two of them side by side, it's definitely a widescreen experience.
I can do this because I'm running WindowsXP and have a graphics card with two outputs (VGA and DVI). (Right click on the Desktop, click Properties, click the Settings tab, and select, "Extend my Windows desktop onto this monitor.") Although only one has the Start button and the desktop icons, they both function as my desktop. This means I can run two programs side by side -- for example, edit a Word document on my left hand monitor while looking at a PowerPoint presentation on my right hand monitor.
This is especially convenient when writing a report. I can type in Microsoft Word while using the other screen to check facts on the Web or look at a PowerPoint presentation. The only downside is that I loose my cursor from time to time -- I have to circle it like mad so I can see its movement via my peripheral vision and find out where I last left it. Still, it's not as bad as it could be. A fellow Burton Group employee has three monitors hanging off of his PC at home (he installed a second video card). As my wife said when I told her, "Boy, I bet he loses his cursor a lot!"