I had purchased a Droid for myself and an Eris for my wife on 11/8 (from a Verizon Store). Called 611 to ask about the refund for the free Eris - guy said that I did qualify, but had to go to the store with my receipt to get the refund since I bought it in-store. Went to the store - the sales rep and manager told me that the deal was only "buy an Eris, get an Eris," the Droid was not involved in the deal. Called 611 while in the store and the rep on the phone said they were wrong.
Handed my phone to the sales rep, and she went back with her manager. 30 minutes later, the rep comes out to ask for my receipt. 30 minutes later, she comes back out and says it's finally done. She said she argued with the phone rep for 20 minutes about it, asking them to process the refund since they said I was eligible. Phone rep eventually hung up on her, so she spent the rest of the time with her manager trying to figure out how to process the refund in their system. Total time: 1 hour, 10 minutes, but I got my $100 back.
Long story short: if you bought a Droid in the store, you may have a hard time getting the deal done. I'd recommend calling 611 while in the store if they give you any push-back. Also be prepared to spend quite awhile waiting while they figure it out.