At TechEd North American 2009, Microsoft announced that its next release of SQL Server - codenamed Kilimanjaro - will now be dubbed SQL Server 2008 R2.
Although IT professionals and the general public are used to seeing R2 at the end of Microsoft product releases, many of them still want clarification on what it means for SQL Server.
http://databasenews24x7.blogspot.com/2009/07/first-look-at-microsoft-sql-server-2008.html