Yup, using Google adsense. Took a couple of months to tune it. That's really it. I tried 'seeding' the product by mentioning it photo forums and the like but it wasn't worth the time.

Did you mean "How do you monetize it?" (if you meant AdSense) or, did you mean "AdWords" if you really meant "market it"? AFAIK, AdSense is for making money from your content, while AdWords is for marketing your products / services.

I'd also like more info on this - I find that the hardest part of launching anything is connecting my super-cool app with interested people.