Did you realize that 2/3 of all companies have not articulated their business model. This is an amazing stat from Charles Baden-Fuller. The reason it is so high isn't that they don't have it is that they just don't think about it. And that logic chain then goes that if one doesn't think about, it isn't measures, and thus can not be worked on to improve.
The video below is of an interview with Charles Baden-Fuller as he discusses this statistic and some of other business models issues.
Thanks to Tim Kastelle via Anders Sundelin for bringing this fact and the video to my attention.