Anyway, I was going to say I get all mine from Airliners.net - you're allowed to use em for wallpapers but most of them have some watermark and all of them have a bar at the bottom of the picture (that is taken up by the task bar usually). Then I save them to a folder and use Wallzilla to rotate the photo's in that folder randomly. Don't have Windows 7 yet, but when I get it I won't need wallzilla.
if there is anyone with more then one monitor I would recommend "Display Fusion"
imo its better then "ultra mon" u also get a second toolbar on the other desktop and allows you to create some pretty wicked wallpaper :