When is the Annual Meeting?
Typically it is the first weekend in October.
Historically, it has been used to float "new light" ideas before they make it into print. The latest and most convoluted ("overlapping groups") definition of "generation" was introduced in an annual meeting 3 or 4 years ago.
Being invited to the annual meeting is an enormous feather in one's cap. JWs will brag about it for months in advance and for months afterward.
Part of the bragging process is writing an extensive e-mail and sending it to 2 or 3 thousand of your closest friends - not so much for the contents of the e-mail, but to let 2 or 3 thousand people know that you are elite and were actually there.
So yes, the contents of the annual meeting will be available to several billion net users within a few hours of the meeting's completion. I'm sure we'll all be commenting on it here on JWD that Monday morning.