Having thought about nothing other than iPhone or web/SaSS apps in the recent months, seeing this makes me fascinated at just how much of the web (and creative outlets) I don't know.

Yeah I had no idea about this either - it is so encouraging to find new stuff online. New markets, new experiences, new ideas. I think for a lot of us, being out on the forefront of technology and innovation (especially regarding the internet), we forget what it is like to discover a new thing, and how much fun it can be just to feed our curiosity in a new way. I think if you can deliver that same feeling to your users you've got a winning app.