Compete: A One-Eyed King Gets Crowned

TNS  bought Compete today for what could turn out to be $150M in cash.  Not bad for an eight-year-old company reportedly doing $15M in revenue and burning $5M a year.  Here's a very interesting study on the SEOMoz blog that looks at the traffic estimation/ prediction accuracy of a number of services like Compete.  Technorati did well by SEOMoz's method; I've added a couple of Technorati-provided services in the left-hand sidebar of this blog for reference.