My friend Roger Ehrenberg has posted one of the most honest candid post mortems on a failed startup that I have ever seen from the leadership of the company. His company, Monitor 110, tried to use technology to surface investable information from the Internet. That is an incredibly difficult problem to solve and I have witnessed more than a few firms stub their toe on it. But it's the back story that Roger tells that is the most potent. Every entrepreneur and VC needs to read his post.