I find the color green very soothing as a background image, so I took a fantasy pic I had on my desktop computer, beefed up the green and released it on n900wallpapers.

It's got three pretty abstract backgrounds that look nice with icons on top and one with a nice woman's face in the left corner for "wow-effect".

It's available here:
http://n900wallpapers.com/wallpaper/forest-girl