Crontabs live in a branch on devpad:/code/pqm/crontabs/launchpad-production/ (look at loganberry-launchpad file).
Current schedule (as of 2009-11-10) is:
Friday: Karmic
Proposed schedule (2009-12-10):
Monday: Jaunty
Tuesday: Lucid
Wednesday: none (Launchpad releases day)
Thursday: none
Friday: Karmic
Saturday: Lucid
Sunday: none
Notes: Hardy exports on request - TBD