I did this promo over a month ago and just received my Senseo this morning (Saturday delivery, can you believe it?) You just send in a picture of how you would use or are using your old coffee maker. They're not picky at all, I don't think. I've heard of people putting a potted plant or a bouquet of flowers inside their coffee pot, etc. I used mine as a wine cooler. You get the idea. Anyway, I got my confirmation in less than 24 hrs. By the way, they need the credit card info to charge you the shipping costs ($15).
Also, they also offer this promo at nationwide malls. I work in downtown San Diego and they had this same offer at Horton Plaza both Thursday and Friday of this week. You just drop off your old coffee maker in exchange for the Senseo. There is no shipping charges to deal with.
Here's a copy of the confirmation I received when I got confirmed:
CONGRATULATIONS, xxx!
Your Drop the Drip™ photo has been approved!
Your free Senseo® machine will be shipped within 4-6 weeks (due to high demand) upon a charge of a shipping fee of up to $15 on your credit card. Actual color may vary.
Credit card charges on your credit statement will appear as Promotion Mailing Center, a fulfillment center for Sara Lee.
