If this is old news - apologies.
It's new to me.
I've had need of the ability for CC members to communicate privately with me. This was problematic for MD player members.
I've just tested a method for doing so using PMs. I sent one our members who is an MD only player a PM. He was able access it by navigating to any window that allows the URL to be changed. CC Forum works and is pretty quick to get to.
He then manually input
http://www.wgt.com/user/conversations/default.aspx
and was able to view and respond.
It should be dead easy for WGT to provide a link for all MD folk to use. I'll be sending CS a direction to this thread.