This has been accomplished before, I'm hoping some of the people who do use this as a negotiation tool post up and let us know what goodies they were able to get. I know last time some people were able to get free phones, one time credits, monthly credits etc..
It's been done before, it all depends on the rep that you get when you call in. Most times if you're persistent you'll find someone to take care of you.
Excellent, answered my question on the first page.