This was announced by one of the moderators in chat this morning.
"NBC Nightly News crew will be at the Royal's house TODAY at 10:00am PDT. They want to see how the chat room works, so we will be doing a roll call sometime between 10:00 and 11:00 am (PDT)."
NOTE: They are taping THIS MORNING, even though it is nightly news.
Just FYI - they wanted to get the word out, everybody welcome.
If interested, you will need a ustream id, which you can get by clicking on sign up at the top right corner on a ustream page.
(Roll call is when everyone types in their location all at once and they just scroll up the screen.)