It looks like a Google Pagerank Update is going on right now. This blog, which is pretty recent and had a Pagerank 0 has now a Pagerank 4 on some of the Google datacenters!

You can have a look at this forum thread (on DigitalPoint) to read more about it and see what other webmasters are saying about it.

The Pagerank update is something that all webmasters are waiting impatiently. And it happens only a few times a year. Have a look at this page to see the full history of pagerank and backlinks updates. You can also see estimations of incoming updates.

A Pagerank 4 for the Pay Per Click Blog, that wouldn't be bad! Let's wait until the update is stable. So, how are your sites doing?