Tired of listening to the djs on the radio ramble? Think you've got a sharper wit and a quicker comeback? Put your money where your mouth is and be a DJ for 30 minutes over 99.5 WBAI-FM. Format for the program, "Everything Old Is New Again," includes music from pop and jazz standards, Broadway and cabaret. Tape the segment one Sunday in June. It will air on a Sunday in July or August. Wow your friends and family with your pithy presentation!