I got the integration between ActivePurchase and the Infralution license generating system working now. It took most of the weekend, but that was because this was my first time doing something like this. It will probably take no more than an hour for the next product I need to integrate.
I'm writing a big HOWTO article, that will take people through the steps to make this work. This will have both screenshots and code. I started writing it, but it will take a little while to get it done. I have 2 loose ends with PainlessSVN itself, then I'm turning my attention to fixing up some pages in this site.
I already put up the download trial and buy buttons, but you'll only see them if you are logged in. I will be putting in a couple discount codes. So if you want to buy PainlessSVN at a discounted price, you'll need to watch this blog. Create an account, and you may see some other goodies.