Ever since early in the year it has been a goal to get all servers upgraded to the "latest and greatest major branches" of software... we started by introducing PHP5, then MySQL5, and now, finally, we'll be moving all servers over to Apache 2.2.x to replace the current 1.3.x lineup. We had actually looked at making this jump back when we first implemented PHP5 in January, but some glitches that cropped up during the testing phase left us well, concerned, and ultimately we decided to put the upgrade off a bit longer.