Looks like Google’s datacentres are in the middle of another Page Rank update. Google does this from time to time to update it’s published values for Page Rank used by third party services (for example the Google Toolbar). Anyway, while the Google Dance is ongoing you can see some interesting results. Here’s what Google.com showed up as on a PR checker:
(As you probably realise, that’s a bit tongue-in-cheek. Sites will be getting erratic readings until all updates are complete)



