The Microsoft SharePoint Team has published a clarification for which Operating System versions SharePoint 2010 runs on. So if you are wondering which of your (old) machines can take SharePoint 2010 without change, take a look at the Operating System Requirements of SharePoint 2010.
Update for SharePoint Service Pack 2 expiration issue ( 8 Jul,2009 )
FIFA World Cup 2010 – Free SharePoint Template ( 25 May,2010 )
PowerPivot Installation on SharePoint 2010 ( 29 Aug,2010 )
5 Tips on Effectively Planning for SharePoint 2010 Migration ( 21 Apr,2010 )
PowerShell Cheat Sheet for SharePoint 2010 ( 19 Apr,2010 )