Today we are having our first Google Toolbar PageRank update of 2008. At least there are dozens and dozens of reports that PageRank scores on the 72.14.25.x data center has been updated.
What does this mean to you? To your rankings? Nothing.
More on that on Why do some SEOs want toolbar PageRank to go away.
In any event, for many Toolbar PageRank is a prestige thing. So congrats if your PageRank score went up. Sorry if it went down.