SQL Server 2005 Service Pack 2 December CTP is available now for download. You can download it from:
Note that the December CTP has been published to the same location as the November CTP so if you come from the SQL Server 2005 CTP Home Page and get to December CTP don't be confused.
Please take this opportunity to test your applications with the new service pack and provide feedback on the new features or bugs that you encounter.
Next week, I will be posting series of articles that highlight some of the new features in SQL Server 2005 SP2 release.