Thanks! I'm guessing you mean this one:
http://www.amazon.com/HS10036684-2-Inch-Electronic-Access-Pistol/dp/B0012OS4GK/ref=sr_1_2?ie=UTF8&s=hi&qid=1257377713&sr=1-2
Not bad for the price, but I'm a little put off by this review:
"I'd knock off a star or two for this. I recently attempted to open the homak "safe" using the same code that I set when I first received it - it didn't work. I attempted again and again to open this safe, but the light kept flashing red. I decided to break my way in, and was able to do so - with no more than a mere hammer. A couple of really good whacks to the dead center of the door bent it enough so that the locking mechanism at the top bowed out, allowing me to open the door with just my fingers. This took all of 45 seconds, and it wasn't very loud."
I think I'll keep looking
I'm still curious what others are using and how. There has to be a better way.