I'm sure he'll chime in, but Patrick was making more from BCC than he was from his job by the time he quit. http://diycomputerscience.com/blog/post/2011/07/01/create-a-...
In all seriousness, good luck!
I admire those who can persevere at their dayjob whilst building up a side business, i really wish i could do that without going insane. Patrick must be made of sterner stuff than I ;)
Have you experimented with in-app purchases? (E.g. looking at the impromptu presenter and the fertility app)
Your icons look a little bland, though (maybe it's just my taste) :)