Originally Posted by EricB
that good if you want a few pictures I got a few pictures of 3 rivers that way. but it sucks if you want a lot as most pictures are low res
Actually, I just found out that after you do an image search, right between the search bar at the top and the results thumnails, there is a combobox that says "Images: showing." If you choose "Large images," it will filter out everything except the images that are suitable for wallpapers. I've also found that if you include the word "wallpaper" in your image search, it filters out a lot of crap.
After making these discoveries, I definitely hold that using Google Image search is the best way to do it.