The challenges for Microsoft Dynamics CRM continues with the announcement of RTM of Microsoft SQL Server 2008.
You can read about the official release here.
The newest version will have 7 editions: Enterprise, Standard, Workgroup, Web, Developer, Express and Compact 3.5.
You can also download it at MSDN or Technet subscriptions, the Express and Compact 3.5 are already available for public download.
Have fun experimenting, if you didn't already with the beta :)