Ozzie: "How difficult the go-to-market challenges are. I suppose it shouldn't have surprised me, but in both the cases of Notes and Groove, building a market in something that's new can be as, if not more, challenging, than building the technology. We were building some very complex technology, and I thought, since we were developing to what seemed to be a fairly straightforward customer value proposition, going to market would be a lot easier."<p>from Founders at Work, in the interview with Ray Ozzie (I'm reading the Kindle version, so I don't know that actual "page").