I have just received a message stating that the Google Dance has just begun (15th June). Although all the servers currently seem to be showing the same data, it is certainly different to when I last checked a week or two ago.

Can anyone confirm that their ranking has changed or is this just a false alarm?

Ive seen some major changes in my former site Tech Forums and one of my newer sites alll of a sudden has a PR4 from 0

David, I think it may be underway, but it may take awhile for the new data to roll over to all the servers.

Currently the only data center I see different is: www-fi.google.com

Usually new PRs are assigned towards the end of the update.

Anyway, I do think it may have started (but who knows how long it will take this time).