American Airlines announced that they would be charging $15 for a customer's first checked bag. What new revenue streams are the other airlines implementing?

United—$25 seatbelt rental fee for passengers who didn't bring their own

Midwest—$35 to sit in the passenger compartment

JetBlue—New fee structure for wait times on runway: $150 for under 2 hours, $75 for under 4 hours, etc.

Frontier Airlines—$20 penalty if passenger is not wearing coonskin cap

Continental—$100 reduced-fare tickets for standing-room-only passengers

Southwest—Ten bucks to touch the captain

Virgin—$30 fee for booking a flight with another carrier

Delta—$50 to chip in for gas