man_in_poland - 3:52 pm on Feb 11, 2010 (gmt 0)
Baseballguy - take plenty of care and there should not be a problem at all. Last year my host decided to shut down a whole datacenter (where one of my dedicated servers had been for at least 5 years). I stuck with them because they are very good, but the actual moving process was planned meticulously and worked fine - no loss in rankings at all. Just keep checking at each stage, and as everyone has mentioned - keep the 'old' site active for at least a few days until the 'new' one beds in.