SQL Server 2012 SP1 CU1 was released on Nov 20th, 2012. You can get more information from the KB listed below.
2765331 Cumulative update package 1 for SQL Server 2012 Service Pack 1
For more information on SQL CU version, please refer to the following link:
Awesome! Thanks for posting this. I never seem to get the notifications when the CU's get released.