Today my official Star Trek door chimes arrived from Think Geek! I bought three - one for the entrance to my office, one for the theatre room, and one for the library. When you walk past, the chimes make the characteristic "swoosh" sound heard whenever Kirk, Spock or the others went over the threshold of their context-sensitive doors.
They can also be set to sound Red Alert when intruders intrude.
Sylvia was thrilled to see that I've finally decorated the basement.