I usually get my desktop wallpapers from Interfacelift.com
Users post their pictures and wallpapers they create there and there really is some amazing stuff. Most are available for download at any of 14 different resolutions. They have RSS feeds too, so you can see when new ones at your resolution have been posted.
They just added iPhone resolutions now. Here is the URL for those:
http://interfacelift.com/wallpaper/index.php?sort=date&w=320&h=480
Users post their pictures and wallpapers they create there and there really is some amazing stuff. Most are available for download at any of 14 different resolutions. They have RSS feeds too, so you can see when new ones at your resolution have been posted.
They just added iPhone resolutions now. Here is the URL for those:
http://interfacelift.com/wallpaper/index.php?sort=date&w=320&h=480