I just try the TurboGears Identity Management function,
Thanks Jeff, the TurboGears identity system is pretty slick :-)
I think we need a more clear and "actionable" document, so I "fire up" and modify the IdentityManagement doc on trac.
http://trac.turbogears.org/turbogears/wiki/IdentityManagement
Updated 20060410: Now the document has been the Turbogears official document, get it here.