Apparently, Google is working hard to have the pilot program up and running in London in the first quarter of 2012. The plan is then to have Google Wallet fully functional in time for the London summer Olympics, which begins July 27th, 2012. In preparation, Google is reportedly in negotiations with several banks, distributors and retailers.
Having Google Wallet fully functioning in time for the Olympics is a good start in getting visibility for Google's NFC payment system, but if Google limits the program to Android devices, that will mean only Nexus S owners will be able to use it (and Galaxy Nexus owners who have unofficially loaded it.) There has been no indication that Google is planning to release Wallet for any other platforms, but getting it on BlackBerry would certainly help as there are far more BB devices with NFC than Android.
source: Les Echos via The Next Web