This is a cool new feature in travel apps that I'd like to see a lot more of: Lonely Planet has released some walking audio tours as apps on the App Store. Unfortunately, all of the tours so far are just based in London, but the apps will walk you around some of London's most interesting areas, including Covent Garden and the West End, bringing along audio reviews and insight from Lonely Planet's editors and experts. The apps will work offline (for tourists traveling abroad), but they're also location aware, so you can get the audio read out to yo