I am taking three talk topics along - one on Linux Containers, the merging of systems like OpenVZ and Linux-VServer, a second talk on version control systems in part based on a four part series I posted to use.perl [1 2 3 4], and discussions with the bazaar developers. The final one is just really showing the Service Processor on the SunFire boxes in action.
I don't know which ones people will want to hear, but it should be an interesting weekend...