Cash-flow muses
jsterce: I fell into one of these with one of my hobbies--nature photography.A couple of years ago  I setup JS Nature Photos (http://photos.jstechs.com) basically how it is now as a branch of another site at the time. Soon traffic to JS Nature Photos dwarfed traffic to the main site. The other site was fizzling anyway. Practically all of the revenue from JS Nature Photos is from ads (people don't buy photos online).  It brought in some pretty good money through the first half of 2008, till the economy tanked.I don't have time to do much with it with school, etc., posting a photo every week or two if I'm lucky, but it still pays the rent each month.