As described by the mail, some of the goals of the team:
* we will triage and fix bugs on both http://bugzilla.ubuntu.com and http://launchpad.net/malone/
* we will list new shiny desktop stuff we should have (no promise we'll get any of them in for Breezy)
* stress-test our favourite desktop environment
* discuss and fix issues and bring some good hackers in, knowing how different parts of the desktop work and able to reply to some specific questions
* create a technical place/list with people having good knowledge about specific desktop parts
Feel free to join #ubuntu-desktop (freenode) if you have any question, are interested to do some work, want to chat about the cool stuff coming, ...