FacebookWall is a simple implementation of posting to user's wall on Facebook using the old Facebook iPhone SDK.
The API is defined in the header file
FacebookWall.h. Sample project is
Adding the code to your project
Add the FacebookWall directory to your project. Make sure you check the option Recursively create groups for any added folders.
Go to your project's build settings. Find the setting User Header Search Paths and add the value FacebookWall/FBConnect to it.