Was the live session for Monday 18th May cancelled?
Yes, I posted several times to the "chat room" that I was canceling the session because my voice is messed up. I also posted the cancellation to twitter.
Probably the best way to stay up to date with the live trading sessions is to create a twitter account. Once you've done that, go to twitter.com/foursquared and click the follow button.
That is the way that I tell people about changes or updates to the live trading session times.
I will be doing another session at noon eastern time today and then doing the session at 4am eastern tomorrow. Because I have "stayed off" my voice for a while it is getting better so I should be good to resume the regular schedule.