IBM's WebSphere RFID Information Center - middleware for multi-company RFID supply chain applications - was announced recently. I first saw this technology demonstrated at the IOD conference last year and it looked impressive. Using Informix Dynamic Server as a data server it conforms to the Electronic Product Code Information Service (EPCIS) specification to guarantee secure and reliable data sharing, providing "a scalable, secure, and standards-based repository for data that the sensor network generates in the supply chain".
ComputerWorld has the following report: IBM pushing RFID data repository.
RFID Information Center can be downloaded Here.
RFID Information Center - powered by Informix