11.1.1 A problem with the data model (and a solution)
11.1.2 User/relationship associations
11.1.3 Validations
11.1.4 Followed users
11.1.5 Followers
11.2.1 Sample following data
11.2.2 Stats and a follow form
11.2.3 Following and followers pages
11.2.4 A working follow button the standard way
11.2.5 A working follow button with Ajax

(BUT somewhat strange with ajax working. investigate it later.)
correct for test code, ajax snippet mistype
11.3.1 Motivation and strategy

(test is fail at this stage)
11.3.2 A first feed implementation
11.3.3 Subselects
11.3.4 The new status feed

(Probably it is not edit here; my omission somewhere.)