One thing to be aware for your servers in the spring of 2007 is that there is going to be a change to when Daylight Savings actually occurs. Here is a post from a newspaper on the matter:
"Lawmakers made recent changes that will extend DST four to five weeks beginning in 2007. The Energy Policy Act of 2005 will change DST’s duration from the second Sunday of March to the first Sunday in November. Those in favor of the change said the US will save on energy costs by taking advantage of the extra hour of sunlight during the extended period."
This means that your servers won't make the automatic adjustments on their own and if your applications are date/time sensitive, this might cause you some hassles or big problems. I found out that Microsoft is actually addressing this issue and will issue some patches to fix for the adjustments required. More information can be found here: