From Fedora Project Wiki

Default Theme Artwork Submissions

Release name for F15 has been selected: it's Lovelock.

Supplemental Wallpaper Submissions

We have a special wiki page just for uploading your supplemental wallpapers:

Submit your supplemental wallpapers here!

Release Banners Submissions

Alpha

Beta

Countdown

GA

Splashes Submissions

Anaconda

Firstboot

GRUB

Syslinux

Other Release Graphics Submissions

Release Poster

Web Sites Banner

CD & DVD sleeves