Cool, I keep meaning to get som RFID gear and play around with it - so many things and so little time.
Currently I've done the classic robot arm project that i'll put up online shortly so there's code, parts and how to fabricate bits but after that I'll do some xbee and RFID work (and totally steal your ideas and code! ;D)
Cowjam - I'll have to try out your code with my LCD screen for stats on my site... though instead of the ethernet shield I may just try and hook it up using Processing to parse from a PHP page (not sure if that can be done)