recently my page rank went to N/A from a 0 PR..It was 0 for 3-4 hours then suddenly it came back to N/A...I came up with this that it takes several months to get your page ranked by Google ...so just wait.... http://s.dpstatic.com/smilies/smile.png http://techsea360.blogspot.com/2011/07/windows-8.html
Well, since someone DID bring this thread back up after 3 years... The "Toolbar PR" is updated about every 3-4 months. However, PageRank actually updates continuously, but this data is kept internally by Google. This is why there isn't any fluctuation in rankings when they update the public Toolbar PR.