I am happy to tell you that the Knowledge Base article for the CRM 2011 Update Rollup 12 release (http://support.microsoft.com/kb/2795627) was made public yesterday.   I wanted to let you know that even though the KB says UR12 is available now (KB is published 1 week prior to release), it will actually be posted next Thursday, January 10th to the Microsoft Download Center and will be live on Microsoft Update on January 22nd.  

In addition to the UR12 KB, there are a number of other KBs that have been published on some specific topics tied to the December 2012 Service Update and Update Rollup 12.  These articles were also published yesterday and today in preparation for next week’s release.  

http://support.microsoft.com/kb/2790161

Existing Global or Service Administrators in the Microsoft Online Portal do not exist in Microsoft Dynamics CRM Online after applying the December 2012 Service Update

http://support.microsoft.com/kb/2792854

Documents left navigation link does not appear in the new Lead and Opportunity forms in the December 2012 Service Update for Microsoft Dynamics CRM Online

http://support.microsoft.com/kb/2790874

The process control does not appear for some users in the new sales and service forms in the Microsoft Dynamics CRM Online December 2012 Service Update

http://support.microsoft.com/kb/2790793

How to continue using the classic forms after applying the December 2012 Service Update

http://support.microsoft.com/kb/2792837

Indexes added with Microsoft Dynamics CRM 2011 Update Rollup 12

http://support.microsoft.com/kb/2669061

Microsoft Dynamics CRM Compatibility List

http://support.microsoft.com/kb/2784954

Browser compatibility introduced with Microsoft Dynamics CRM 2011 Update Rollup 12 or the December 2012 Service Update

http://support.microsoft.com/kb/2784960

Users are redirected to Mobile Express in Internet Explorer 7 after the Microsoft Dynamics CRM Online December 2012 Service Update

http://support.microsoft.com/kb/2784079

FIPS 140-2 Compliancy with Microsoft Dynamics CRM 2011 Update Rollup 12

http://support.microsoft.com/kb/2555051

Microsoft Dynamics CRM 2011 updates and hotfixes