Online classified sites such as Craigslist and Kijiji have made it very easy for small entrepreneurs market goods and services on the Internet. These two very popular sites along with many others specifically dedicated to the residential property market have been a boon for many businesses and property owners seeking to connect with potential renters.

Until now everything has been just great for Airbnb, a service that lets people rent out their homes and become a sort of mini-hotel. The company launched in 2008 and has grown rapidly. They’ve been cloned by the Germans, which is always a mark of success. And they’re now a part of the billion dollar valuation club. Even the clone raised $90 million.