Funny I should be blathering about SF and Sci-Fi and end up referencing the Prometheus myth and Bester's PyrE; Lou Anders, editorial director of Prometheus Books' science fiction imprint Pyr, just started up a blog
, and his first entry is on the distinction between literary "SF" and cinematic "Sci-Fi", focusing on the different way each treats the "intrusive" elements which disturb the status quo of the story's background. It's great reading, well worth checking out.
And his second post is about Fonzie from Happy Days as an archetypal shaman figure. Superb!