Nothing to worry about, apparently:

YELLOWSTONE NATIONAL PARK, Wyo. - Scientists say the odds of another catastrophic volcanic eruption in Yellowstone within anyone's lifetime are extraordinarily remote, but that's exactly what happens in a made-for-television movie that will air this Sunday.

Discovery Channel has a neat promo for the movie, along with some good geological/historical information about Yellowstone. Should be a fun movie. I'm eager to see whether Denver gets totally wiped out.