I just noticed some of my sites with altered Page Ranks so it looks like Google are shaking it up again! This is only 2 months after the last one at the end of October, so it looks like they're not sticking with the old reliable 3 month revisions anymore.
As usual, I've made some PR losses, but this time around I made more gains, with a lot of new sites getting a PR1 for the first time. A lot of my niche sites have picked up, which means the linking strategy is having some effect in that department too.
Oddly, this site didn't change (the forum is still unranked thanks to those bloody spammers a year ago) - looks like despite all the high power links I have pointing at it, the G men don't want to count them so a lowly PR2 it is destined to remain until the next revision. Ho hum... the MMO niche is probably the most unloved by Google - even Griz's blogspot blog took a hit and is down to PR3. Despite all the links, it seems that the type of niche plays some part in the ranking process.