We haven't talked much about this update yet as it's still undergoing extensive work and design, but obviously it will be shipping with Phoronix Test Suite 2.2 "Bardu" for its testing framework. This update to PTS Desktop Live is codenamed "Loderhof" and will be formally introduced as PTS Desktop Live 2009.4 when it is introduced in the days following the PTS 2.2 release.
The Loderhof release will be derived from the Ubuntu (9.10) Karmic package set, but it will begin to incorporate more bleeding edge work that highlights the latest upstream Linux developments. In particular, we are looking at shipping PTS Desktop Live 2009.04 with the Linux 2.6.32 kernel (potentially using the BFS Scheduler), X Server 1.7 / X.Org 7.5, and the latest Mesa packages including the use of ATI R600/700 3D acceleration support by default. Ideally we will also see some mode-setting/2D support land for the ATI Radeon HD 5700/5800 graphics cards in time too. We are also exploring some other kernel optimizations, rebuilding the package set with optimizations targeting newer hardware, and other speed improvements for this x86_64-focused benchmarking environment.
Much more information on PTS Desktop Live 2009.4 "Loderhof" along with Phoronix Test Suite 2.2 "Bardu" will come in November.