Besides the Intel Gallium3D benchmarks and Linux 2.6.38 EXT4 / Btrfs benchmarks that I produced, from the OpenBenchmarking.org community atop Phoronix Test Suite 3.0 there is already:
NVIDIA GeForce GTX 580 benchmarks under Linux. We have yet to receive any NVIDIA GeForce 500 series GPUs for review under Linux, but OpenBenchmarking.org already has information thanks to the community.
Nouveau NVC0/Fermi benchmarks. Nouveau's Martin Peres wrote in this morning about "Omagaad, Nouveau can be Faaasssst!" While we have delivered Nouveau Gallium3D benchmarks, we haven't yet delivered any results under this reverse-engineered open-source 3D driver for the Fermi "NVC0" hardware. The Fermi acceleration support was only merged into the Linux 2.6.38 kernel and recently into Mesa and it currently requires loading out-of-tree firmware/microcode for acceleration.
Beating us to the punch, from the community are now some Nouveau Fermi benchmarks. There are some Nouveau NVC0 benchmarks here and then this dynamic merge, which puts the performance into perspective. The Nouveau driver for this latest generation of NVIDIA GPUs is quite good. Hopefully more results will be up soon.
Whatever software or hardware topics interest you, just search for it on OpenBenchmarking.org.
Update: The beauty of crowd-sourced benchmarking... A few minutes after posting this news, results for what appears to be an EVGA GeForce GTX 580 SuperClocked were uploaded (and here too, including OpenCL) under Ubuntu 10.10 and the binary driver. If you wish to see how your system's graphics performs to this NVIDIA beast, with Phoronix Test Suite 3.0-Iveland installed, just run phoronix-test-suite benchmark 1102273-IV-EVGANVIDI98.