>ABNB reminds me of Etsy in that it facilitates real commerce in a marketplace model directly between two people.
Interestingly enough, I still tend to side with Fred's assessment of AirBnB's future. All my experiences with it as a user have been too unreliable to expect that it can scale to truly massive usability. Selling your old guitar online is a lot different than renting a room to someone. Renting a room has so much more of a personal aspect to it.
There are so many more subtleties to actually having a stranger come and stay in your house than there are to sending a stranger a book, guitar, etc via USPS.
Regardless, I still think there's a massive market out there for this type of thing, I just don't see it swallowing up the whole Hotel industry.