The next cumulative update is available. It is still highly recommended to install SP1 before you install post SP1 updates.
2596508 The full server package for Microsoft SharePoint Foundation 2010
2596505 The full server package for SharePoint Server 2010 and contains also the MSF2010 fixes so you need only this one package.
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.
My post for June CU and SP1:
Post made by my colleague regarding a rerelease of June CU: