I'd be interested in:
Alien: Harry Dean Staton, Yaphet Koto, Ian Holm, Sigourney Weaver.
Aliens: Any.
Bruce Campbell
Pat Tallman: Could be interesting to have her do a talk. She's been an actress, stuntwoman, worked on several sci-fi shows and movies and it was announced this week that she now is running Studios JMS with J. Michael Straczynski (Babylon 5, Spider-man Comics, etc).