I don't do well with digital notes. I don't know why. Despite numerous attempts, I can't manage my thoughts on a digital sheet. It's not convenient enough...yet. A physical notebook feels better to me... So digital notes and task lists aren't something I typically use.

Additionally, I think there are too many barriers between me and my task list with services like this. I'm launching a similar product which helps individual keep track of people they know within their browser. My burning question is wondering whether the browser is the place where people are asking "Where did I know this guy from?"

In a similar vein, I wonder if people will want to require an internet connection, browser, and however much time it takes for the user to access their account. Reducing the time gap between epiphany and recording seems like a noble goal for your product to tackle. I think if you get this part right, you'll have something that's marketable. (I believe it's usefulness is obvious and without question.) Other companies in this space have reduced this gap significantly by deploying a mobile version of their service.

Regardless of a viable business model, this is really cool. :)