New issue do we still need wsaw:UsingAddressing?

Per Bob's request on today's call, I'm raising a new issue that came out 
of the resolution of CR33:

Since we have decided to add wsm:Addressing as a policy assertion and 
rev the namespace and decided that ws-p is the way forward rather than 
WSDL extensibility, what do we do with UsingAddressing?

I see three options: a) keep it as wsdl marker and policy assertion, b) 
keep it only as a wsdl marker, c) remove it completely

-Anish
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