The Chat with people sourcing experts happens every other week on Thursdays at http://booleanstrings.ning.com/chat
If you'd like to keep track of upcoming Chat dates, they are all listed on the Sourcing Certification Program website calendar - http://sourcingcertification.com/calendar/.
It's a real-time conversation. The chat is currently not being archived.
Please note the time: 2PM EST/11AM PST