Basically I have an idea for a Facebook Application that I wish to build.
I wondered if it is possible to get a user's wall posts, including likes and comments, and maybe even posts by other people on a users wall.
I do not have any previous experience programming Facebook Apps, but i'm a confident programmer and just wanted to make sure this is possible before I start learning, as I have not been able to find any useful information via Google.
If someone could just point me in the right direction and a yes/no answer, that would be great :)
Yes.
All of that is available via the Graph API
Note that you have to have the user grant your app specific permissions depending on what information you want to access.