It looks like Google has just updated their (publicly available) Pagerank now, and Datalk.com went up from Pagerank 2 to Pagerank 4..
But keep in mind that the pagerank displayed in the Google Toolbar are "old news" (can be 3-4 months, or more, old) since pagerank is updated all the time internaly on Google but they don't want to give us the up-to-date pagerank to prevent buy/selling of pagerank links etc....
The easiest way to check the pagerank of your sites are through the Google Toolbar:
http://toolbar.google.com/
And you can use online pagerank checkers like this site:
http://www.iwebtool.com/pagerank_che...www.datalk.com
It checks the pagerank on multiple datacenters
And if you've never heard of the Google Pagerank before then you can read some more about it here:
http://www.google.com/technology/
Or do a Google search for it:
http://www.google.com/search?q=googl...rank+explained
But there are a lot of rumors about the importance of pagerank, how to improve it etc. so don't believe everything you read out there..
