We've covered HotelTonight since day one when it burst on the scene as the fastest hotel-booking app on the planet. There's plenty of speculation about how well Airbnb's purchase of the startup turned out for all stakeholders, and HotelTonight indeed had plenty of hiccups along the way. But rest assured that HotelTonight revolutionized the mobile booking of hotels and spurred imitators, large and small, around the world.