Congrats, too! I know someone from another board who got a PowerMac Quad G5 delivered to his door, but he never ordered one. Must've been a mix up since he's a regular Apple Store customer. When he posted his good fortune, other board members ripped into him so hard citing he was immoral for keeping it. It was funny to read.
I've never bought a refurb from Apple as they only just begun offering refurbs at the Canadian Apple Store. Hope to have your same kind of luck...
Hey, if they don't ask for it back, don't give it back! I had a period where American Apparel kept sending me t-shirts I hadn't ordered, when I called up they just told me to keep them.