Oh, man. They're just trying to kill me. Which, I suppose, is a bit ironic, as this is a replica of a medical device.
Seriously, though, check it out. For a measly $39.99, you can be the proud owner of a Star Trek Original Series Medical Tricorder. Exclusive to Entertainment Earth (the "they" who is trying to kill me with all this geeky stuff), this deluxe tricorder not only looks sweet, but even has sound clips of DeForest Kelley as Dr. McCoy, including my personal favorite, "I'm a doctor, not a bricklayer!" It also lights up and makes the beeps and whistles you'd expect.
Now I've had tricorders before--I used the sounds from a toy Next Generation model during a call to convince my friend there was something wrong with his phone--but this one is old-school Trek. It even has a portable medical scanner. How can you not want to buy that? Or, even better, how can you not want to buy that for your Trek-loving husband? (This is directed mostly at my wife, but if it works for you, good luck.)