I saw the last 20 min. of it one day and posted here about it... then someone posted the link to download the Quicktime videos, so I got them and watched it. Then I bought the DVD, then I bought the book... and read it, then I bought his other book (Fabric of the Cosmos) and read it...
That one episode of Nova basically got me started in Cosmology. Now I have read ~6 books on string theory and cosmology. It is my favoritie topic now. 🙂
The DVD is PBS.org for like $20. I have watched it like 4 times. I wish I could get his books on tape, because the way he explains stuff, just rocks.