[satyap]

My side project is a specialty, niche application for speech pathology and audiology courses at major universities. So, traffic is driven by word-of-mouth (all the people in charge of these programs form a community, go to conferences, etc). And then the people involved in the courses are required to use this app. It tracks their progress towards course completion.

Edit: And yeah, it made me, personally, > 1000/month last year. That's after my X% cut of gross. There are < 10 people involved.