The Facebook app is one of the most popular free apps, with an amazing 343,000 ratings. Version 3.0 was released late this week. So if you're into social networking, and like doing it from your iPhone, head on over to the App Store and get the latest version. It requires iPhone 3.0 and has a ton of new features, including landscape mode, the ability to post photos and videos, and much more. According to online discussion, everyone is pretty thrilled with this new version, saying it's very different from 2.5 and a huge improvement.