There are similar threads for other phones but not the Nexus One, so now there is.
Please use this thread just to post wallpapers, use other pertinent threads for other queries/requests.
I have attached a bunch of different kinds of wallpapers that I have collected since I started using the Nexus One.
A couple of overlays are also included, courtesy of H0CKEY. I have edited them to fit the Nexus One.
I am not the creator of these wallpapers. I simply edited/re-sized them for an optimized look on the Nexus One. All credit goes to the original creators.
For best results, use the free app 'Wallpaper Set and Save', it gets rid of the gradient banding and colors look much crisp compared to using the stock gallery.