I see that there is a uPnP-printing conference call at the same time as the WBMM conference call. I had not been aware of this conflict. I do not know how many potential WBMM attendees would want to also join the uPnP call, but I am sure that there are some (I for one). On the other hand, it may not be easy to reschedule the webex etc.
Please send me an email about the possibility of shifting the WBMM meeting to 10PM PDT (1 PM EDT).