A new in-depth look at the forthcoming Facebook 3.0 application for the iPhone has social networking fans chomping at the bit for the updated software. New features include a completely re-worked homescreen and the ability to post videos directly from the iPhone 3GS.Facebook engineer Joe Hewitt gave TechCrunch and exclusive first look at the 3.0 version of Facebook for the iPhone. Writer M.G. Siegler says "Facebook 3.0 may be the most useful app on the iPhone yet." That's quite a bold claim. Does Facebook 3.0 live up to it? Hewitt was the main man behind building the new application, which gives the entire experience a refreshed look and feel. The new homescreen has been completely re-imagined and features large, easy-to-press buttons to access different functions of the application. The nine features available there include access to the news feed, profiles, friends, inbox, chat, requests, events, photos and notes.