Don't know if any of you know about this site, but I find it a great resource for cool looking wallpapers and stuff.

a few sections of special interest:

~ sci fi
*great designs of nebula's, galaxies, stars, and planets for anyone wanting to find a good background for a stellar map

* pictures for decorating world maps

I'm sure that you guys can use it for plenty of other uses to, these are just a few suggestions.