July Google PageRank Is Here - What's Your PageRank?
It looks like this is it - according to Matt Cutts' Google Blog, he announced yesterday that the Google Toolbar Pageranks are being updated. It's been a while since the last PageRank update - right around the end of April, 2008 - but it has been an expected interval, since it appears the Google PageRank updates are coming in every 3 months.