I am developing iPhone app where I need to provide integration with different social media like FaceBook, Twitter, Google etc. I have seen couple of iPhone applications that allow people to login using their existing FB or Twitter accounts and allow to post comments, like/unlike, follow people etc. I want to implement something similar but not sure where to start with. Could anyone please suggest me right direction? Any documentation and sample code would be great help.
Thanks.
http://developers.facebook.com/ has just about all the info you might need. Further also look in Apples library as it contains sample code and extensive information about most topics.