If you are asking about the frequency of PR update... it takes place all the time, though it is loaded up and reflected in the front end(major PR update) only when google feels so. The interval for major PR update has been approx. 3 months... if past is any indication and by the same logic, it should be due by the end of this month! Regards, RightMan
If it's still on track with the once every 3 months, then we are due again near the end of this month.. *crossing fingers*
I do not think now is 3 months, can be updated quickly, the update is not the principle, what you need is waiting, PR Moreover now nor have much more useful, you should spend more time promoting your site.
I have seen google update PR even in a month. But ya generally it updates once every 3 months. Cant say when google feel like updating website PR