Nice work. I've also recently released my first Mac app [0] and I'm working on getting the word out about it by making it free, the idea being that if it's known by people, it can be spread through word-of-mouth, especially if it becomes indispensable. GitHub's API currently reports 600 users, and I'm working on increasing that to 1000 before making it a paid app and marketing it.
Nice to see both approaches here; I wonder which truly works better in the long run.