1.) JGears2, a simple Java2D shape rendering benchmark (Zack Rusin's QGears2 ported to Java) is available on the project page.
You can give it a try using Webstart.
Update: Somebody else did the port almost simultaneously, and his veryion even implements the "fance" mode: http://trac-hg.assembla.com/jgears/wiki#Java2D
Well, this clearly deprecates my version ;)
2.) I am currently developing RenderMark, a simple XRender benchmark written in C. It test the areas the pipeline uses heavily, to allow driver/xorg developers to find regressions and optimize their drivers for our type of workload.
A first version, only testing geometry processing, can also be found on the project pages.
Hopefully it will help AMD to optimize their drivers, and will be integrated into the phoronix unix benchmarking suite.
3.) Google decided to build a new datacenter located 2km away from my home. Strange ;)
4.) Today I got Catalyst-8.11 working on my HD3850.
As I suspected its almost software-only - so results are not bad, but also not that good.
Lightbeam/Nimbus took 9300ms vs. 15500ms with the X11 pipeline, and 6800ms with the NVidia driver.
However the nvidia driver hit fallbacks, so once these issues are resolved things should be even better.
By the way, the Radeon does the job in 4000ms on WindowsXP with the D3D pipeline - thats definitivly where I would like to be after the rewrite (and with useable drivers!)