Why don't the embedded videos play on my site?

Hi there, I'm running 0.0.9 on WP 2.5.1.

I have no problem with recording and posting (although I do get the "Or add a video comment with __________ issue"), but the videos do not post in a playable form. Only the link to the video on the Seesmic site works. Can someone help?

Examples: http://openstacks.net/os/2008/05/05/n...

Or the comment here: http://openstacks.net/os/2008/05/05/c...

Thanks,
Greg Schwartz