http://blogs.msdn.com/dmahugh/archive/2006/07/28/Rehydration.aspxThe new Open XML file formats offer true compatibility with all of the billions of Office documents that already exist. You can take any existing Office document (well, any created in the last decade or so), open it in Office 2007 Beta 2, and then saveen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/dmahugh/archive/2006/07/28/Rehydration.aspx#688463Fri, 04 Aug 2006 14:51:46 GMT91d46819-8472-40ad-a661-2c78acb4018c:688463Wouter van Vugthttp://blogs.msdn.com/dmahugh/archive/2006/07/28/Rehydration.aspx#733850Thu, 31 Aug 2006 21:07:07 GMT91d46819-8472-40ad-a661-2c78acb4018c:733850Wouter van VugtDoug Mahugh has got an interesting post on the Office Compatibility Pack and a feature called rehydration