@ Carlidin;
I'd be REAL careful with that. Ever hear of Tortious Interference? You better make yourself REAL Familiar with that if you plan on sending a letter. I am not a fan of Wiki, but its a good explanation:
http://en.wikipedia.org/wiki/Tortious_interference
I posted elsewhere, but ALL AGENTS...you need to get Termination Agreements filled out when you JOIN a company, not when you are leaving.