Office Service Pack team announced Service Pack 2 for Microsoft Office SharePoint Server 2007 and Windows SharePoint Services 3.0 would be available on April 28th. It provides many fixes and performance improvements, as well as some new features. Also with the new service pack, Internet Explorer 8 will be added into browser support matrix as level one, and Firefox 2.0 and 3.0 as level two. We recommend every customer to start planning their patch window to apply this service pack. Please look out for more details on the 28th.
Jie Li
Technical Product Manager, SharePoint
Source : Microsoft SharePoint Team Blog