Go ahead and subscribe to that one (the link above) and it will download. Once subscribed it's available. I found this out since I was already subscribed and happened to look into that group in "Podcasts" in iTunes... There it was...
Just tested on a machine that has fresh OS, first run of iTunes... Subscribed and it started downloading right away.
It is a smaller rez than the HD stream, however. But with the HD stream pixelating, it's probably actually about the same quality. I do wish they would put in a true HD version in the podcasts, though.
Now I can watch it on the Apple TV. WooHoo.
Yup!! That worked for me!!