Has anyone tried this (as host or guest), and if so what are your experiences? My initial thought were that its dodgier than hitchiking but having taken a closer look I like the review system etc, and the ones where you can pay for a room, house, boat etc as an alternative to a hotel look like they have great potential if you're discerning about it, a bit less anonymous than a hotel I've provisionally booked to stay for a weekend in Dublin in a lovely looking house at airbnb.com and I'd therefore be quite interested to hear any feedback from anyone who has tried a similar thing.