I posted this to the Escape Factory website yesterday and thought I would crosspost it here as well for your perusal:
I am just playing around with making myself some groovy looking wallpapers and lockscreen backgrounds for my iPad and realized it is not as easy as just whacking up some 1024×768 image. There is the whole auto-rotating issue. In the end I decided to make a template, and I made it just a wee bit nicer so I could post it here.
Lovely isnt it?
The basic upshot is that for desktop wallpapers (the one that shows up behind your icons) your best bet is to make a 1024×1024 image and the center 768×768 is the area that will always be visible.
Here are some examples I took, to give you an idea:
It is important to note that the iPad overlays a gradient on top of your image (as well as icon shadows), so if you want to be color-perfect then you will want to take that into account.
As for the lockscreen, it is a slightly different beast since it has the overlay bars. In portrait, you have the same 768×768 ‘safe’ area in the middle, but in landscape that is chopped down to a slightly thinner slice of image:
Thats it! have fun, make some cool wallpapers!