Obviously I didn't make this first one, but I did blend the images together and take out the website names at the bottom.
http://img560.imageshack.us/img560/618/dualmonitor.jpg
And these two I made separately a while ago and just combined them.
http://img217.imageshack.us/img217/6662/dualmonitorswtor.jpg
I've never done any dual monitor wallpapers before so hopefully these work alright.