Announcement :: SharePoint Designer 2010 RTM
Microsoft SharePoint Designer 2010 (64-bit)
http://www.microsoft.com/downloads/details.aspx?familyid=566D3F55-77A5-4298-BB9C-F55F096B125D&displaylang=en
Microsoft SharePoint Designer 2010 (32-bit)
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=d88a1505-849b-4587-b854-a7054ee28d66
SharePoint Designer Team Blog
http://blogs.msdn.com/sharepointdesigner/default.aspx
