I just did the Futaba trade up program thing. It was pretty slick. There are some very specific instructions on the form you mail in. It has to be a surface radio traded in for a surface radio. There is a very specific list of brands that qualify, model # doesn't matter. Spektrum & Airtronics are a couple I remember. Traxxas radios and rtr radios were not on the list even though a lot of those are 2.4. You have to send in both the Tx and a compatible Rx. And it has to be 2.4ghz, regardless if it's called Spread Spektrum, FHSS, whatever.

Mail it in and a couple weeks later I got a gift voucher from Futaba that was made out to me and secifically listed the hobby shop where I bought it. The voucher is only redeemable at that store. The voucher is good for anything Futaba. Another radio, servos, Rx, whatever you want. Mine was $150 for the 4pks upgrade and it damn near got me two free 614 Rx's. Pretty cool.