[splish]

Many "weekend" projects are starting out as experiments or self-educating exercises. Depending on the overall scope or drive of the developer these have potential to become apps or small revenue generating adventures.

To your question though, I recently stumbled onto http://sleepyti.me from this post: http://news.ycombinator.com/item?id=2399054 and it looks as though this exercise in learning jquery is now enough to cover his rent.