Well, I got my coins! It took about a day or so for him to send my coins after I placed my order using a MoneyPak code.

Originally though, I thought he hadn't sent my coins yet. I kept waiting for the coins to show up in my client and they weren't there, but it turns out I just hadn't downloaded the block that contained my transaction yet. I figured this out when I decided to do a search of my btc address today on blockexplorer and saw that he had sent the coins already.

So in my case, even though he sent the coins out to me within a day, I thought it took longer because I didn't see them in my wallet yet.
It might help if in the future, he would let you know he sent the coins out, this way you don't think you've been ignored or scammed.

So yeah, make sure you have the latest block chain downloaded so they'll show up pretty quickly in your wallet (unless you use an online wallet, in which case they probably have the latest block chain).
It'll keep you from freaking out over your coins as I did.