Even Airbnb can't resist the urge to copy Snapchat, it seems. The home rental outfit is quietly beta testing a Stories feature in its iPhone app that (surprise!) lets you document your trips with photos and short videos. You can view the resulting productions both on your phone and the web, and they appear to automatically link to places in the stories along with the related accommodations. Clearly, Airbnb sees this as a marketing tool -- you might be more likely to book a rental if you see examples of what people did during their stays. It doesn't hurt that this could get you to use the app beyond scheduling your own trips.