SharePoint 2010 SP2 Release

I believe, It has not announced so far - as of (April 2012) on SharePoint 2010 SP2,  however you can always go for cummulative updates :

Scroll through this page it gives a detailed list :
http://technet.microsoft.com/en-us/sharepoint/ff800847

Also Keep an eye on this thread:

http://social.technet.microsoft.com/Forums/en-us/sharepoint2010setup/thread/f21c3d7f-8391-42fb-a0d3-bd450518db59