Here are a few things you can do with your new-found number-entry tool:

Barcode symbologies that the CueCat reads:

Ok, here I have a Symbol LT-1780 handheld barcode scanner. It has an RJ-45 cable with a 9-pin end (Not RS-232). I took an old RS-232 plug and put that on the end of the cable, and used that to wire it up to the Arduino.

Pics Soon.