Multitasking is NOW available on the iPad. This clever application includes three apps in one: a Safari browser, a Twitter and a Facebook app. They run at the same time, allowing you to browse the web, while receiving alerts of Twitter and Facebook updates.
The browser can work in half or full mode. While in full mode, Twitter and Facebook run in the background, alerting you to updates with sounds. Even when the device is sleeping, the app will alert to new tweets.
The three apps have all the features you'd expect, like tabbed browsing, favourites, retweets, replies, photo uploads, friends lists, etc. See it in action below: