I posted about Poolga last October but I thought it deserved to be mentioned again. Poolga is a free resource for desktop wallpapers for iPhones and iPod Touch from some of the most inspiring illustrators -- Darren Booth, Malota, Lazlo Kovacs and dozens more. The wallpaper artists are selected by invitation only so the work is top notch. Just the links to the illustrators/artists' personal pages make it worth a visit (even for you iPhone haters, Kirsten!).
Who doesn't need a little pocket inspiration?
[More images available at their Flickr page too!]