PyCon US 2013 adds 6th talk track
pycon.blogspot.com
pycon.blogspot.com
Why assert that it's a one-time thing if the conference has only been growing every year?
I'd rather hedge now, then set the expectations it will "always be this big" - because honestly, I don't think PyCon should continue to expand, and that this should be a one time thing for the conference.
Long term; the PSF and PyCon itself will end up pushing more and more local / regional conferences and capping attendance at the 2500 attendee level intentionally.
tl;dr: Continued unbounded growth in attendance, number of tracks, etc will dilute the conference and take it in a direction most within the community and the foundation do not wish it to go in.
-PyCon Publicity Coordinator