Yet another smart post by Kathy Sierra: You can out-spend or out-teach. Snippet:

...teaching is the "killer app" for a newer, more ethical approach to marketing. While in the past, those who out-spent (on ads, and big promotions) would often win, that's becoming less and less true today for a lot of things--especially the things designed for a younger, more-likely-to-be-online user community.