Please do not let us limit your creativity. If it looks nice go for it , I am sure everyone is bored of the older kde wallpapers on the internet or would like a bit of change to the SL desktop one ? I could be wrong but willing to take a chance.
1440x900 should be a okay if you can.
PS> This is not other forums /OS's websites where every freak has a pain and complains , we are most of the time mellow and open to suggestions / new idea's and here to enjoy all good things or so I hope , LOL.
You do not have to be limited by the distro colours as many of us like something with a bit more colour in a toned down way unlike my avatar icon thingy for the forums LOL.
Actual sunset photo.
As long as you have the name or logo in it , it should be fine ?
As mentioned before we have lots of space on ibiblio.org and can have the files there if needed as the max last time for a pic on the forums was 256k I think.
I was checking out some of these:http://wiki.clug.org.za/wiki/Main_Pagehttp://wiki.clug.org.za/wiki/Wallpapers
The freshmeat's one's = interesting "5lack" has a few nice ones as well.http://themes.freshmeat.net/screenshots/45594/
fsck. = LOL would not mind being admin there.