It's hard to say when PR will update. Nobody really knows for sure except those at Google. Typically it updates every 3 months so it should be any day now but that doesn't mean it will. Sometimes they throw everyone for a loop.
It is futile to keep waiting for something which is controlled by somebody else. Look to focus your energy instead on things which you can do with your own hands... like creating good content and backlinks. PR is anyway useless for traffic and hence... better to concentrate on serps which would give you traffic and thereby revenue! Regards, RightMan