Gumroad gives awesome metrics and stats, they even track the source of each sale. The downside for me is that almost every sale is through my site, so the refer

Gumroad gives awesome metrics and stats, they even track the source of each sale. The downside for me is that almost every sale is through my site, so the referrer is always the same (nathanbarry.com). Since the entire purchase happens in a secure iFrame I have no way of knowing on my site when the transaction completes. So I can't use Visual Website Optimizer or Google Analytics to track the conversion. I hear they are working on this... Otherwise they are wonderful.