Al,
might I suggest to use an IRC channel as the location? Say #lrn. We can then create a new instance of the irc-logger package on OpenACS to log and index the chats and make them available on OpenACS. The log could be located under https://openacs.org/projects/dotlrn/irc/log/.
Just pick a name for the logging robot, eavesdrop on #openacs.
/Bart