You know you want this. It is the coolest toy of the week.
Yes, it does what you think... When you enter the office, it makes the "wusshhhhh" noise of the STar Trek Doors. Hit the comm button and you hail the bridge. A button on the back switches the sensor from right to left side detection or both. A volume switch will tone it down a bit.
Thinkgeek.com sells them...