Crazy / entrepreneurial types are trying to cash in on the volcanic ash-induced flight shutdown in Europe. At VolcanoTaxi, you can bid (starting at 500 Euros rising to 4,000+) for a car ride anywhere across the continent. The site does all the pairing on the backend, rather than opening it like Craigslist, which maybe adds a touch of legitimacy. Of course, if people are willing to rent bedrooms from strangers on airbnb, why not bid for a ride especially if multiple passengers are grouped together? For single rides, as in single night's stay, cutting out the middleman should always make things cheaper.