The free app lets you speak conversationally with your iPhone, iPod touch or iPad. Say things like "What's the best steakhouse in Kansas City", or "Find me some pictures of Lady Gaga", and the app will parse what you said and nearly always return useable results.
The update, which should hit the App Store today, adds many more options, including the ability to launch popular movie and TV streaming services; get direct access to more of the most popular names in mobile content, like Spotify; get answers to the toughest of questions from Wolfram|Alpha and Ask.com; and, find friends on Google+.
I tried some of the new functions, and was impressed. For instance, I said "Watch Mad Men on Netflix," and Dragon Go initiated a Google search. When I clicked on the resulting link, my Netflix app launched and the show started. I also successfully searched TUAW for articles and had it define words using Dictionary.com. For apps that require a login, you'll have to set up Dragon Go! to link with those apps, but that's not a difficult task.
Vlad Sejnoha, chief technology officer at Nuance said "We're deeply invested in continuing to evolve Dragon Go! with new features, more content providers and richer app integration, and ultimately opening new doors for the consumer mobile destination experience. This is another step towards the mobile semantic web, and we've just gotten started."
These new services join Google, Bing, Yahoo, Wikipedia, Twitter, YouTube and many others that were already built into the app. I find Dragon Go! and Siri (now owned by Apple) to be two of the best demos for the iPhone around. If you already have Dragon Go! you should see the update today. If you don't have it, download it and impress yourself and your friends.