I agree that the IBM Time Zone wallpaper that came with my new T42p was farily nice and tasteful, I got to thinking that why not try to find a better world map to use as wallpaper. One that actually has detail.
So I did some searching around and didn't find any really nice world maps in 1600x1200. Even National Geographic's web site didn't have any good map wallpaper that I could find.
Then after some more googling, I discovered the Earthview software by DeskSoft:
http://www.desksoft.com/EarthView.htm
Let me tell you this is the absolute coolest wallpaper I have ever had. You can download a 14 day free trial but the full version costs $25. This software will put a satellite photo of the earth on your desktop that is completely customizable. You can zoom it in and out, add markers for any city you want that will display the current local time at that ciity, etc. etc. The really cool thing is the night and day feature which will darken the parts of the globe that are in night and then bring on all the city lights.
I'm stilll playing around with this softwware and not getting work done. I'll put a shot of my displays running this wallpaper over on the thread where people are posting photos of their thinkpad setups.