See the following page for the F17 Artwork Schedule: F17_Artwork/Schedule
Concepts Selected for Further Colorization
These are the concepts there will be pushed to the colorization stage.
This is the concept on which the default wallpaper in Fedora 17 will be based.
Post Alpha Feedback & Refreshes
Widescreen (16:10; 1920×1200)
(Old) Standard (4:3; 2048×1536)
Normalish (5:4; 1280×1024)