McDonald company in Japan is launching a pilot project using the emoney system:
iD of NTT DoCoMo
http://www.nttdocomo.co.jp/english/service/osaifu/index.htmlfor customers who have a mobile phone with the felica contact less smart card embedded.
The project includes 175 branches.
Be aware that the mobile phone is not used in the process:
it's the smart card attached to the phone chassis or inside that do the transaction work :-)
This is for security reason and hacking issues, there were some project about using bluetooth but very easy to get reversed\hacked.

Official announcement in japanese is here:
http://www.mcd-holdings.co.jp/news/2008/company/20080519.html