Well you're both not alone I bought a game earlier today with Paypal (no I do not have different e-mail address), and nothing. They took my money from my account but no e-mail, no game. I mean if it is some kind of security hold, they could at least tell us what's going on ! I have sent an e-mail to Stardock but if they don't resolve the issue within their 48 hours standard resolution time, I might just file a complaint with Paypal and grab the game in store.
ders17: as averyvaughn49 told, it is not supposed to happen. I have bought quite a few games from them and it's supposed to be instant. Still, that kind of things are very annoying.