RFID Noob

As I've stated, I am new to this so any help will be greatly appreciated. I have a parallax RFID reader connected to an Arduino Diecimila. Thanks to a found bit of source, I am able to extract individual tag IDs, but I am having trouble doing anything with them. Ultimately I want to be able to associate these IDs with more readable names, and then save those name to a text file.

I am assuming that Processing is the way to go for the text creation, but I am unsure of how to get at the IDs from Processing.

Thanks.