Last month, a backlink update followed a few days after Google SERPs showed no fresh dates for any search. Today, once again, no fresh dates are showing up. There are also various reports that people are starting to see PR changes to internal pages. In addition, www2 and www3 datacenters are redirecting to www. Looks like some sort of update is being geared up to take place. Since we just recently had a backlink update, perhaps this time it will be a PR update. Will be interesting to see if there is any correlation between these occurences and that of a pending update.