The quarterly page rank update took place on 3rd April 2010 . It was similar to the usual updates, some websites improved, many lost PR.
Another page rank checking tool http://www.pagerankme.com/ Page loads quickly
There seems to be a small PR update today 13 February 2010. Many websites have got a new PR and some have also lost PR.
Google PageRank update history for major PR updates is as follows: 30.10.2009 24.06.2009 28.05.2009 02.04.2009 31.12.2008 27.09.2008 26.07.2008 01.05.2008 04.03.2008 12.01.2008 27.10.2007 10.08.2007 10.04.2007 25.03.2007 28.01.2007
http://www.siterankchecker.com/ Provides the following info Domain Age Google PageRank Indexed pages No. of backlinks Web archives Alexa traffic rank Daily traffic trend Compete traffic graph
http://www.checkprinbulk.com Check PR for 20 websites Takes some time for the PR to be displayed.