now that Nokia chose to officially abandon the patent idea...you are welcome to embark on an acedemic scale POC and incubate the idea into realization...infact i wanted to present it one of those forthcoming gs1 sessions in Singapore and wrote to one joe.horewood in this context, awaiting his reply...

Results matter whoever does it.

All i wanted was couple of symbian programmers, SDK for that phone model' OS, emulator, 6 man months to develop and test. but symbian/ nokia have a market driven approach rather than idea driven.
http://v3.espacenet.com/publicationDetails/biblio?DB=EPODOC&adjacent=true&locale=en_V3&FT=D&date=20090226&CC=US&NR=2009055278A1&KC=A1

my point was a phone with messaging and rfid reading capability can function like a full fledged POS, "Shopping cart to Parking lot", need not stop to pay (like in traditioal self scanning) thus a complete transaction in a viruall unmanned store... you can email me if u wish to embark on the project.