Nokia has funded some development work that has resulted in a set of eleven patches for exposing CFS low-latency features. These patches were done by Mathieu Desnoyers and Peter Zijlstra. According to Mathieu, "With this patchset, I got the following results with wakeup-latency.c (a 10ms periodic timer), running periodic-fork.sh, Xorg, make -j3 and firefox (playing a youtube video), with Xorg moving terminal windows around, in parallel on a UP system (links to the test program source in the dyn min_vruntime patch). The Xorg interactivity is very good with the new features enabled, but was poor originally with the vanilla mainline scheduler."
These patches exposing the new low-latency CFS features for the Linux kernel to further enhance the desktop responsiveness can be found on LKML.org. Though due to the current position of the Linux 2.6.36 kernel, this likely will not be a candidate for merging until the Linux 2.6.37 kernel comes about.