1. If you don't subscribe to National Geographic, you can't watch the livestream. (Lame.)
2. The NatGeo setup techs didn't notice their mic was live during setup. ...whooops.
3. @NASAWatch is live-tweeting for curious non-NatGeo subscribers.
Update: it looks like even NASA had a hard time watching.
If you get the National Geographic Channel there's a two hour event live from the International Space Station and Mission Control in Houston starting at 8 pm Eastern Time. The UK's Channel 4 has its own broadcast this Sunday as well.