Same thing with me! (except for the gift card part). I had ordered Riding the Bullet from Amazon waaaaay back in June 2009, and had since heard that no (official) copies would be supplied to Amazon, but I basically just left the Amazon order open to see what they would do. My copy (sans slipcase) just arrived today.
I have to say I'm pleased with the quality of the copy itself, just bummed that there's no slipcase. I'm hoping I can buy an "aftermarket" one. (I'm currently waiting to hear back from Brian Freeman).