Income on the Side? 
pxlpshr: iPhone apps and consulting work.From a boot-strappers perspective, I had hoped for more sustainability from iphone sales, but we make far more building apps for other people (for cold-hard cash) than we do from our product sales. Nevertheless, it's a nice global gumball machine that we're participating in. Hopefully AppStore makes some much-needed changes in the near future.Animosity aside, I'm still very bull about the mobile market. You can build it and put it out there for nothing.Lastly, MEANINGFUL income on the side == full time job. Sorry to break it to you but there are no shortcuts outside of luck (or perseverance).