Hi Nick, I've been using your themes for a while now and cannot stress how much time they have saved me. Well written, easy to modify (if you need to) and the support is top notch. For $19.99 a year - you could quite easily charge that per "theme" and still be giving people real value for money.
All I can say is thank you and please keep up the great work - and I really can't wait for the new look Admin Panel.
I have include a list of the sites I run, for people to have a look at how they look when filled out with content.
I have 3 more that are works in progress, including my own personal blog, my girlfriends personal blog and another betting related membership site - needless to say, they will all be using your themes