I found this old article in a link from a link from a link... don't even remember what I was originally looking for... but this is a great e-mail exchange between Judd Apatow and Mark Brazill. Given how it plays out, it's no wonder Freaks & Geeks (or Undeclared, for that matter) is infinitely more entertaining than That 70's Show (or That 80's Show, for that matter).