Doug Napoleone is drafting a call for panel discussions. Some ideas for web-related panels have been added to the Talk Ideas wiki page, and Jeff Rush explains further. Brett Cannon is thinking about organizing a python-dev panel. What other panel topics would be good?
For people not familiar with panels: they're moderated discussions where 3-5 people discuss an issue. A moderator keeps the discussion moving and also has a list of topics for discussion so that the conversation doesn't die out. For PyCon, panels may end up being 45 minutes long; 30 minutes of discussion between the panelists and 15 minutes for audience questions and comments.
And remember... only two weeks are left to submit proposals!