On the way back from that I remembered that the Computer history museum was nearby and since I'd never managed to get in while it was open I thought I'd try again. It was my lucky day. Just as I walked in and caught sight of The Difference Engine a docent was starting a talk about it. It's an awesome machine. That made getting up early worth it.
There was a bunch of other old hardware, but after The Difference Engine it all seemed somehow a let down. Though the Cray 1 was pretty cool, and you could stand inside of that!