Nice work. What kind of open source license?

MIT

It's great that you chose this license, it is truly selfless to pick the MIT license. Kudos for that. More projects should be on MIT.

Seen latest developments - nice job.

Nice the web thumbnails.. can't find the iphone client.

That's not released yet. But we just released Evernote integration - so that is a path from any mobile client.

Minimalistic approach: 60 lines of code. Interesting.