One of the pleasant duties of America's most famous announcers during the relatively short swing era of the big bands was to host late-night remotes from some of the most famous ballrooms throughout the country.
For the first time we're allowing developers who don't work at Facebook to develop applications just as if they were. That's a big deal because it means that all developers have a new way of doing business if they choose to take advantage of it. There are whole companies that are forming whose only product is a Facebook Platform application.