The Chained should be a set of classes. The main body should be a core class which is a combination of the aristocrat and expert classes; Mr. Clark believes that it should be based on the Courtier class from Oriental Adventures.
Those that want to study magic would then take the Chained prestige class.
After the ten levels of the Chained prestige class, other options are available. The character could rejoin the core class. The character could join a Chained prestige class similar to that of the Loremaster prestige class from the Core Rulebook II. Finally, they could be invited to join an unacknowledged high level cabal of wizards called the Unchained; this prestige class may or may not be outside the control of the church of Archum. Given its secrecy, it very well be hidden from Archum's clergy.
If these new classes/prestige classes are ultimately developed, these names could be used.