I was looking at a sweet one that also allows you to enter a code. It hooked up to the internet and allowed you to program restrictions on codes. For example, if you had a maid come in regularly (wouldn't that be nice?), her code would only work on certain days or during certain hours. Or if you were afraid you left your stove on and wanted someone to check, you could give them a code that would only work one time. I don't know how much you'd actually use those features, but it was a neat gadget.
