Ruby RFID?

I stumbled across http://blogs.bl0rg.net/netzstaub/archives/000539.html
which really interested me, as I am looking to test out some RFID stuff
here at our retail company. Being able to leverage the logic and
simplicity of Ruby along these lines seems promising. Of course this
example deals with a specific RFID reader hardware/firmware type. In
this case a ID ISC.PR100 USB model.

Does anyone know if there are other projects being worked in Ruby which
interface with RFID readers?