I am currently compiling themes for Windows 7 consisting of the best of the Artwork/Wallpapers available. These themes are featured on our blog. We have started a gallery of Windows 7 themes here.
I wished to make a theme about Apple. Planning to use your Apple Wallpaper 2. For credits, a text file would be provided with the theme, which will give you due credits for your work as well as a link to your profile on DeviantArt. The credits are also given in the Deviation details. Please see my Profile and gallery for details.
Hope its alright with ya!