This is pretty unbelievable. Refreshed at 10:00 and the site was already down with a "we'll be back soon" message. Obviously, the bigger devs would have got their tickets days (weeks?) ago.
I'm not sure they will have. Perhaps a few of the really major companies like EA, but I know some pretty prominent developers for the platform and none of them have ever mentioned anything about getting priority tickets.
I think there's some subset reserved for Developer Relations and they give them out at will - I've never noticed a particular strategy with respect to app store placement.