During a Google update it is hard to actually “SEE” anything for a long period on Google or the Toolbar as results are spread through multiple data centers.
In order to have a good indication of what your PR and BL’s will be after the update it is best to use a tool that check multiple data centers on Google.
Keep in mind the tools are not always accurate and should be used as a guideline and not a definite check.
Here are some tools to check Google PR and BL on multiple DC’s (no particular order):
http://dl7.info/pagerank/index.php
http://seologs.com/pagerank/current-pagerank/currentpr-dc.html
http://www.seologs.com/pagerank/prv1/pagerank.html
http://www.wmtoolkit.net/seo-tools/pagerank-checker/
http://www.seochat.com/?go=1&option=com_seotools&tool=9&url=
http://www.mcdar.net/Q-check/datatool.asp
Once the update is finished, you will see the changes in your Google Toolbar and on Google by searching for your url with “link:” before the www.
Don’t forget to keep an eye on Matt Cutts blog, as he is usually the one to report on these things once the cat is out of the bag.