Compass Airlines has added a $17500 sign on bonus:
"Compass Airlines First Officers can now earn up to $58,500 during their first year with the airline, thanks to a new $17,500 signing bonus. The $17,500 bonus will be paid in three increments over a pilot's first year of service. The new signing bonus is in addition to a recent pay hike for First Officers, which raised first year pay to $41.00, the highest in the regional airline industry."
Compass Airlines Rolls Out $17,500 First Officer Signing Bonus