Wow, you sound bitter! Is even the possibility that he whole retirement thing was staged ala Pro Wrestling or at least never sincere enough to keep you away forever?
Really seems like WFAN kind of played it well from a business perspective:
1. Milk the retirement for all the ratings its worth
2. Try some cheap new guys if they are good lucky, and move to plan B
3. Hire Francesa back at discount, hype the he's back storyline to resume ratings juggernaut
4. Go back to advertisers get old Francesa monies
5. reap profits, repeat as necessary (maybe a suspension next time