The
Canada Post website now says "Canada Celebrates the Royal Wedding and 2011 Royal Tour". Clicking on this link takes you to a page that says "Be sure to visit our store, opening Monday, June 27!".
This implies a new stamp issue (or more than one) is/has come for the wedding itself and the upcoming tour of Canada by the Royal couple.
A call to my local post office hinted that a
new Royal Wedding stamp was "issued" a couple of days, although the stamp(s) is not available anywhere due to the postal lockout.
Guess we will have to wait until Monday...