I wish they would take the component of springboard that lets you customize the homescreen wallpaper and make an app that just lets you change the homescreen wallpaper. I dont want icon srcrolling or anything, I just want to get rid of the boring black background.
You can do this by simply choosing a picture from your Photo Library and setting it as your background. Just drop a picture into your Pictures folder on your Mac, set iTunes to sync that folder (or whatever folder you want) and it will be there waiting for you in your phone.
Hope that helps.