This is basically a longer version of an offhanded comment I made earlier regarding answering the "How will you get users?" question on the YC application. I wasn't sure if it made sense or not, so I tried talking through it. I'd be interested in hearing what you think. (This is by no means a canonical answer to that question, by the way -- it is just an extended riff on my particular way of looking at it.)
I for one am very happy you decided to write this article. I've been thinking on this exact question ever since I read your comment, and while I don't have answers yet, your article has given me a lot more food for thought.