As someone who travels a lot I am really fed up with overpriced Hotels that usually offer less more than over decorated Hotel rooms a mini bar and a tv. When what you really would want is WiFi, a simple and not to expensive room, a nice breakfast and friendly people.
So I love this Idea:

"During a casual conversation about the upcoming 2007 IDSA conference Joe Gebbia and Brian Chesky, two independent entrepreneurs with product design backgrounds, had the idea to rent out extra space in their apartment to conference attendees. They then launched a website so that other San Franciscans could list their own apartments as convenient crashpads for conference-goers. "

www.airbedandbreakfast.com