Congratulations! I remember it very well when I saw your post on HN. At that time I thought this is such a simple problem and simple solution that is ... hmm... bound to be successful! Just like pen.io which was just as simple, but if you think about it, why does it have to be difficult? I'll sure look forward to using your service.
Great job! I remember when you released it. Out of the many things that have been released on HN, Gumroad certainly stands out in my mind as one of the most unique and well executed so far.
It is always a good day when someone simplifies something, Gumroad is a great example of this.
Congratulations and I hope Gumroad becomes wildly successful.
So... thanks! :)