Microsoft would like you to have the latest and greatest tools available as you embark on your upgrade journey
: The great news is that several new tools and migration options are now available
SQL Server 2014 Upgrade Advisor supports 2005, 2008, 2008 R2, and 2012, and enables you to plan for a direct upgrade path from any of these versions to SQL Server 2014
SQL Server 2014 Upgrade Guideis newly published, and has complete information on how to plan, execute, and validate your upgrade to SQL Server 2014 across a variety of workloads
If you are thinking of upgrading to the cloud, please preview the new version of Azure SQL Database which has higher compatibility than ever to on-premises SQL Server.