Service Pack 3 for Exchange 2010 has been released. The SP3 was probably most eagerly awaited for the migration or coexistence with Exchange 2013. However, we still have to wait for the CU1 for Exchange 2013.
The SP3 can be downloaded here:
http://www.microsoft.com/de-de/download/details.aspx?id=36768
The CU1 for Exchange 2013 is also expected this quarter. So be patient a little longer 
A new update rollup (UR6) has also been published for Exchange 2010 SP2:
http://www.microsoft.com/de-de/download/details.aspx?id=36716
And here you can find the UR10 for Exchange 2007 SP3:
http://www.microsoft.com/de-de/download/details.aspx?id=36708
