Q: Does Beam Us Up only apply to Keepers with the brain icon, or the crew-member icon (or visitor/other personnel icon)?

A: Yes. In Star Fluxx, the use of the word “beings” in that card’s instructions indicates only those cards with the Living Being icon (the brain). In either of the Star Trek Fluxxen, the use of the phrase “Crew Members” indicates cards with the Crew Member icon (the starfleet badge). In Star Trek: DS9 Fluxx, this is extended to also include Keepers with the “Visitor / Other Personnel” icon.