On the 7th-8th November, 2011, Google was updating the Page Ranks. In my blog network, most of my websites going up in page rank. This is indeed a good news, although most of them up by only one point.
The page rank update came after Google update their Caffaine search algoritham which impacts 35% of the search results. Anyway, both are not related.
For those who are new to page rank, it is a metric between 0-10. 10 is the best while 0 is the lowest. The rank depends on many factors, mostly on-site SEO and backlinks to your website.