In your case, you had a user base you could pry at to push the next app up the chart. Knowing the method by which you did this is valuable for developers in a similar position, for sure. However, what advice might you give to developers that haven't yet reached that point? How did you establish the base that allowed you to do this?
I posted this story earlier, but I decided to make it into a blog post since I reached #7, and I also included some analytics on the bulk e-mail that I sent out.
Would be helpful to know how you got BridgeBasher up in numbers as well, as this success seems predicated on the prior success.