OCS 2007 December CU Live Meeting update has been released on Dec.30, 2012. Below is the detail information.
2770455 Description of the cumulative update package for the Windows-based Office Live Meeting 2007 client: December 2012
2770463 Description of the cumulative update for the Live Meeting Conferencing Add-in for Outlook: December 2012
Please note that the links to the corresponding KB entries are broken ...