I have received three, but the ones I ordered printed from Moo should arrive tomorrow or Saturday, so I can send them out before I hit that all-important "received more than half you've sent" point.
How long ago did you place your MOO order?
I ordered them on Tuesday, and I got a dispatch notification yesterday, and they arrived this morning. Which is pretty fast turnaround.
I'm really not happy with the print quality, though. They're horribly grainy and the tones are all messed up on the B&W - they're worse than my cheap inkjet printing on budget 4x6 paper, and certainly nowhere as good as the (now four! thanks Piet, Sandeha, Miles, Paul!) cards I've received myself. I've sent a complaint about it.
I suppose at this rate I'll probably end up going to a shop, having some printed as normal photos and then gluing them onto card.
EDIT: To be fair, Moo have now got back to me with apologies, saying it was a production error that wasn't caught, and that they'll reprint and send them back out. So, I should have some replacements next week, which hopefully will be a lot better.