Since I've been using this myself for 2 weeks now and I still like it (and use it daily), I'll continue to maintain and (if needed) bugfix it. But at the moment, I don't have any intentions of adding more features. That said, what would you need?
I'll be on the bus to my new years party for the next 4 hours or so.. I'll look into the shop tomorrow. That said, I already got quite a few emails about sales from FastSpring, so in general it seems to work OK.