Facebook Integration into iPhone
Fusion — a jailbreak tweak from Cydia store, allows you to integrate social media into iOS 5 the same way like Twitter.
Fusion, also integrates Foursquare, and even MySpace into your default Twitter composition panel.
But the tweak does not stop there, it also allows you to compose messages for all of the aforementioned networks using Siri (if you have iPhone 4S).
The expansion possibilities for Fusion are virtually unlimited as far as supported social networks go. Because each network is simply a plugin, and additional plugins can be created by any developer.
The tweak is $2 at Cydia store and if you are a crazy social networker its worth getting.
There is one little thing that spoils this tweak a bit. You can write only 140 characters, so if wan to post longer messages to FB wall you better go to FB app. Otherwise Fusion iOS 5 integration is close to perfect.