A great blog for iPhone 4 wallpapers!
http://iphone-wallpaper.tumblr.com/
"...since apple has provided such a heinous selection of iphone wallpapers, i have taken the initiative to start a blog that will continuously create & post simple, elegant unobtrusive designs that will not make you dizzy when you look at your iphone home screen. all wallpapers are 960 x 640 @ 72 resolution. hope you like them. if you would like to submit your own design please use these size settings & send an email to the link below. thank you & enjoy!"
http://iphone-wallpaper.tumblr.com/
"...since apple has provided such a heinous selection of iphone wallpapers, i have taken the initiative to start a blog that will continuously create & post simple, elegant unobtrusive designs that will not make you dizzy when you look at your iphone home screen. all wallpapers are 960 x 640 @ 72 resolution. hope you like them. if you would like to submit your own design please use these size settings & send an email to the link below. thank you & enjoy!"