I just had a similar experience at the office. I got a box from Dell saying I had gotten a free Dell Digital Jukebox (Dell's version of the iPod). I opened it up to find a set of headphones and a blank space where the Dgital Jukebox woud be, and a card saying "To get the rest of the package go to this URL and enter this code". I did, and immediately got a call back from dell asking when I could sit down to a face-to-face meeting with a Dell sales rep, who would be delivering the Digital Jukebox.
Well, I scheduled the meeting (since we're already Dell customers, it should be really short), but I half expect to get just another piece of the DJ and a card saying "To get the next piece, call this number to meet with a member of our server sales team." <sigh>
Well, if I quit now, at least I have a pair of RCA HP155 auto-retractable earbuds....
--Chris