This is a wide ranging and fascinating interview with John Danner. John was the co-founder of another of the major internet advertising pioneers, NetGravity. John gives us some more great background on how the technology and culture of the advertising industry evolved, and because NetGravity was the company that built Yahoo’s first advertising system, we get some great details about early Yahoo. But John also gives us some incredible insights about what it was like during the dot com era madness. If you’re currently an entrepreneur or aspiring to be an entrepreneur, you’re going to want to listen closely to the 2nd half of this interview because John speaks some serious truths about the realities of growing a venture backed business.