Everyone's favorite social networking app Facebook received an update today to version to 2.0. Already well reviewed, version 2.0 offers host of new features in this version and it's still available for free via iTunes.

New features include:

• Notifications
• The full News Feed
• News Feed story comments
• People search
• Friend requests
• Photo tagging
• Photo captioning
• Photo posts to your friends' Walls
• The full Mini-Feed, now combined with The Wall
• Your entire inbox, plus the sent folder and updates tab
• Inbox search
• Message attachments