An acumulative update package for Lync 2010 was released....( April 4th !!!!)
The description of the cumulative update package for April 2011 is described in KB article 2496325: http://support.microsoft.com/kb/2496325.
Lync Client Updates
Lync 2010 Hotfix KB 2496325 (64 bit)
Lync 2010 Hotfix KB 2496325 (32 bit)
Lync Attendee Updates
Lync 2010 Attendee Hotfix KB 2500438 (Admin level install)
Lync 2010 Attendee Hotfix KB 2500440 (User level install)
Lync Attendant Update
Lync 2010 Attendant Hotfix KB 2496326
Lync Group Chat Updates
Description of the update for Lync Server 2010 Group Chat: April 2011
Lync 2010 Group Chat Hotfix KB 2500446
Lync 2010 Group Chat Admin Tool Hotfix KB 2500445
Lync Phone Edition Updates
Microsoft Lync 2010 Phone Edition for Polycom CX500, Polycom CX600 and Polycom CX3000
Microsoft Lync 2010 Phone Edition for Aastra 6721ip and Aastra 6725ip
Microsoft Lync 2010 Phone Edition for Polycom CX700 and LG-Nortel IP Phone 8540
Also for the first time, Lync Server and Client updates are now available on Microsoft Update, as well as through Windows Server Update Services (WSUS). The recently released April updates are available today. In the future, Microsoft Update will be updated periodically with the latest updates for Lync.
Please Note Updates that appear on the Download site will appear a few weeks later on Microsoft Update.
Updates for the Lync 2010 Attendee – User level installation will not appear on Microsoft Update.
Further info here : http://blogs.technet.com/b/nexthop/archive/2011/05/09/lync-updates-available-on-microsoft-update.aspx