From airliners.net, don't flame me, its like in Men In Black where they read the tabloids for info, same thing:

The DOT today has commenced slot proceeding to reallocate former 7 Midwest Airlines DCA slots.
Initially DOT is soliciting applications for two Vision-100 “within perimeter” slot pairs currently used by Frontier on DCA-MCI services.

Selection criteria for the award of slots will be in a manner that promotes air transportation.
1) New entrant carrier and limited incumbent(holds less then 20 slots) air carrier
2) Community without existing nonstop service to DCA
3) Small communities
4) Will provide competitive nonstop service on a monopoly route
5) Will produce competitive benefits including low fares.

Additionally there are 5 other ex Midwest slot pairs where the department will conduct a separate proceeding for.

Submittals are due September 30th.

OST-2000-7182

JetBlue has already indicated to the department that it will solicit for all 7 of these slots.