There’s a lot of buzz swirling about Wolfram Alpha, the new computational search engine — perhaps too much. But regardless, people want to see the service in action to decide for themselves. And some of those people tuned into the preview webcast put on by Harvard’s Berkman Center for Internet & Society yesterday. Unfortunately, if you listened in live, it was audio-only. But Harvard followed up by posting a video of the event to YouTube later in the day — a video without a single shot of the service!

So if you’re interested in watching 1 hour and 45 minutes of footage of creator Stephen Wolfram walking you through something just off screen that you can’t see, we’ve embedded it below for your viewing “pleasure.” But hey, the video is available in HD and at least the camera turns off of Wolfram for the Q&A session, to liven up the action a bit. Still, if you’re really interested in learning about the service, you may want to listen in.

The rest of you may be more interested in the hands on report ReadWriteWeb did recently. Or maybe you’ll enjoy the leaked screenshot of the service — at least that’s something. Unfortunately, we can’t all be Google co-founder Sergey Brin, who got a personal demo of the service recently. Wolfram Alpha is set to launch in a few weeks.