Ben Eckel has been working on an RFID setup to notify other members of the group when someone is at Gumbo Labs. It's not finished yet, but he wrote up a nice post on getting the Arduino Ethernet Shield part connected. RFID <--> Ethernet Shield Client <--> Rails<br>
<br>Check it out:<br><a href="http://www.gumbolabs.org/2010/02/05/rfid-ethernet-shield-client-rails/">http://www.gumbolabs.org/2010/02/05/rfid-ethernet-shield-client-rails/</a><br><br>Simon<br>