I'm also interested in doing that, but with windows/mac/linux & possibly browser games. The problem is that people seem to be somewhat averse to paying for a browser based game (like a Java applet or webstart app), even when they'd have no problem paying for the same game as a standalone program (literally simply using a JPanel instead of a JApplet, or providing an installer to a local version instead of a webstart l…
Our conversion rates are low, but we've managed to get enough people playing to sustain itself, one full time employee (me!) and a few contract employees.
It's been a lot of fun. If you are passionate about games I highly recommend it since it can definitely be sustainable. Having said that, I'm not sure it's necessary a lucrative path for most people.