I arrived at MIT around 2pm, and went to the hacking room. But found nobody there, which I found quite surprising. It would take me 90 minutes to figure what had happened: everybody was at the Rob Pike presentation. At this point, I ran to the presentation, but people were coming back, and found Rob with a group of people coming towards the hacking room.
The good news is that the discussion about Rob's work continued on the hacking room, and I got to catch up on his presentation on the plumber. As part of his plumber presentation, there were various Plan-9 features discussed, which are always nice to see.