Eh.... there will be little code changes.
UBBThreads still keeps its username , password , authentication , authorization mechanism , user data structure , as before. Nothing changes here.
Everybody can still register , login , post , logout ...
It's just opening an service for "outsider program (OpenID consumer)" to query if the user is really the one in the ubbthreads system , if so , please login ; if not , please reject.
In fact , I see no database structure changes here.
Updated: Google, IBM, Microsoft, VeriSign, and Yahoo! have joined OpenID
