I also run dual 22" monitors. Will upgrade them at some point but two minitors is really helpful in alot of ways. I use it much like Kerwin posted. Also watch some Videos and such. Its also nice to have the Voice chat window open. You can pretty much skip an overlay then.

Really wish more Games would make some dual monitor options. Like putting some Bars and UI elements into a second "client" box without putting your main game screen off center by trying to rig it by just expanding the Horizontal

Weould love to have a few "sometimes" needed UI elements on the close side of my second monitor, so my main screen has more space for the nice looking worlds ^^