Liberty is the default theme for my upcoming LiteStep distro. It's highly configurable, totally res-independent and comes with a matching Visual Style for XP.
The fact that I had to google "austerity litestep" should hint that no, it's absolutely not based on that theme... I don't use OTS, never have and never will. :)
I guess both themes are based on the same loosely KDE-ish concept though.

Teshadael wrote on July 05, 2005 at 22:57:
Looks like its roots are based on Austerity.