This awesome website is celebrating 10 years of being online. They have some great ship renderings of an amazing range of vessels. Check it all out here: http://www.starfleet-museum.org/ (http://www.starfleet-museum.org/)
Here's a little sample...
Cool stuff! The Siegfried looks like a Dreadnaught. Interesting that the Belleau Wood, is named after a famous battle.
I found two more sites with some very cool artwork. Some of you may already be familiar with both of these sites. Worth checking out. :)
http://www.bergoiata.org/fe/Sci-Fi/10.htm (http://www.bergoiata.org/fe/Sci-Fi/10.htm)
http://www.startrekdesktopwallpaper.com/StarTrekEnterpriseHistorywallpaper.shtml (http://www.startrekdesktopwallpaper.com/StarTrekEnterpriseHistorywallpaper.shtml)