Thursday, 08 March 2012 12:01
Until now, the SQL 2012 support was slated for the next rollup update, but following this new KB Article : http://support.microsoft.com/kb/2686619; SQL 2012 is now supported on both CRM 4.0 and CRM 2011.
There's still some issues reported with some linked hotfixes, so just don't rush it in production ;)
Ps: Thanks to Jamie Miley for the info