Totally cool! I was driving in a car while it was happening, back from NYC. I wasn't really prepared to watch it anyway though - no filtered way of viewing.
I love stuff like this so much.
I still don't really understand how they use these transitions to measure the exact distance of an astronomical unit - I read one thing that wasn't clear, but didn't really try much harder than that. Still - amazing that they figured out that they COULD do it using this. And I love that they messed up the first time, and then had to wait until the next time a bunch of years, but they were READY then.