I have created a little blog theme over the weekend and made it available for free.  It is available for download here:

This theme should be extracted to your Themes/Blogs folder, then it will be selectable from the My Blogs -> Theme Configuration page in the Control Panel.

The theme that this blog is running is this new theme, which is entitled Infusion.  Also, don't forget that there is a Community Server theme competition going on.  You can find out more about this wonderful competition here: http://docs.communityserver.org/wiki/page.aspx/239/community-server-2007-theming-extravaganza/ 

If you are looking for some inspiration for your Community Server theme you may be interested in visiting http://cssbeauty.com/. 

Let me know what you think of this look.