Well,
www.spaceempires.org is going to be a great site once content gets added by Hadrian. He's always working on some far flung project.
There's
http://universalshipyards.tripod.com, has lots of shipsets and is currently in a redesign stage too.
Look for Atrocities on the board and click on his link, his site has lots of shipsets too. Andres Lescano has a site too.
Unfortunately, many of the other ones are outdated and unloved, but hopefully that will change soon with the release of gold.
[ 13 March 2002: Message edited by: Captain Kwok ]