I think the analogy is the Internet and pornography. People try desperately to lower transaction costs. The internet did that for porn and in the early years porn traffic dominated net usage. Anecdotally I've heard there is around a 20% haircut for black market transactions (drugs, money laundering, etc). So we should expect the majority usage early on for bitcoins will be for black market transactions. I don't think that's a bug, it's a feature. It's hard to get people to change behavior. There is big motivated market that like it or not is very incented to adopt new solutions. Bitcion is what it is. What better beta testers than the black market. ; )