The next cumulative update is available. It now needs to install SP1 before you install post SP1 updates. See also

2687566 The full server package for Microsoft SharePoint Foundation 2010;EN-US;2687566

Download link:

2687564 The full server package for SharePoint Server 2010 and contains also the MSF2010 fixes so you need only this one package.;EN-US;2687564
The KB article might have a delay to be public.

Download link:

Important for all Server Applications listed above:
After applying the preceding updates, run the SharePoint Products and Technologies Configuration Wizard or “psconfig –cmd upgrade –inplace b2b -wait” in command line. This needs to be done on all servers in the farm with SharePoint installed. You can run psconfig in parallel on all SharePoint machines.

SP1 references:

Posts by CAPES:
SharePoint 2010 SP1 and the June Cumulative Update for SharePoint 2010

Office 2010 Service Pack 1 - 5 Common questions regarding the Service Pack