Today is the day many iPhone fans have been waiting for. The announcement of iPhone OS 4.0, slated to drop this summer, has brought with it the most requested feature from iPhone users around the globe. Multitasking. How will mutltitasking be added to the iPhone? Apple’s Scott Forstall explains: “We looked at tens of thousands of apps in the app store, and we’ve distilled the services those apps need to run in the background. So we implemented those services, and we’re providing those services as APIs to developers so they can add multitasking while preserving battery life.” Apple will provide seven services that run, in the background, as application accessible APIs: background audio, Voice over IP, background location, push notifications, local notifications, task completion, and fast app switching. The folks from Pandora claim it took them one day to make Pandora fully compatible with the new APIs… lets hope it is this easy for everyone! There’s also an awesome UI for switching between applications, too.