I wouldn't be too worried about it, because I was in the same boat as you, having just bought a TD9SX. After about a month of waiting I called them to get an update and they said it would be at least 6 weeks before they even entered the rebate info into their system for processing. Then, literally three days later the box was delivered to my doorstep. So there may just be a disconnect on their side on communication but it worked out.
TD-9SX: (details to be updated soon); DW DWCP3002 Series Double Kick Drum Pedal, Behringer XENYX 502 mixer; PC: Vista, Intel Core 2 Quad Q6600 2.4Ghz, 6GB RAM, Kontakt 3 & SSD EX