The layout functionality is now officially feature complete. You can now customize your Registration layout from within your CB template. The Menu layout has also been enabled for registration in addition to Custom layouts to provide your own substitution supported HTML layout for registration.
Remaining layout based parameters have also moved to the template configuration. For profile view the main left/middle/right size parameters are now in the template and the registration layout specific parameters (login, canvas, header, and footer) have also moved to the template.