Although this was the first year this event was held, it attracted a few thousand spectators and about 15 vehicle entries.
here is the official site.

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http://steampunkworkshop.com/steampunk-motorbike.shtml
Read things more carefully. Yep, you're right. All I read was him saying he called it a "steam-electric hybrid." Full quote:
"I call it a steam-electric hybrid - it's stretching the truth a bit. It's steam powered, but it doesn't locamote using steam. I built a steam boiler, put it on the back of the bike. And I had the possibility of putting a steam piston on the bike. But the more I looked into it, my deadline of getting it out the door was more than the scope of what I was learning. And I realized making a steam-punk inspired motorcycle was what I was going for. So it has a steam boiler on the back, which I use for steam effects, but there's no actual link up between the boiler and the wheels."
Still cool!