You know the drill by now… The following are proposed themes for inclusion in Ubuntu 10.04 Lucid Lynx.
Lumus
One aspect where this theme stands out is that it’s not dark AND it’s not a mock-up! Yes, you can actually download this one!
Download
Ubuntu-Lucid
This theme has been knocking about on GNOME-Look for a fair while. The addition of the awesome Homosapien metacity seems to have given it the spur to propose itself for inclusion in Lucid.
It also takes advantage of the latest Murrine engine that can be found in the Lucid repos (which is worth bearing in mind if you’re going to try installing this in Karmic.)
Download