I found this great site - http://www.vista4beginners.com - which has some interesting content - first up, some great new wallpapers for Vista - which are great Vistas. 

Vista Wallpapers Collection

Fri, 03/02/2007 - 11:46 — admin

Today we are very pleased to announce that our site is hosting a great collection of Windows Vista wallpapers that did not make the cut into the final Vista Collection. The author of these great wallpapers is Hamad Darwish - a talented young man from Kuwait with a passion for photography.

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Source: Windows Vista for beginners | Windows Vista made simple