Software For Underserved Markets [2010] (kalzumeus.com)

If like me you usually don't watch videos when looking at the web, make this an exception: fast, content dense, funny.

I really enjoyed this video - both information dense, unique, and funny!

Can't help but think this isn't higher up on HN now because it's a video. In summary, sell to women, they have money, will spend it and few companies sell to them. Also the video is hilarious.