Microsoft just released CU1 (KB3074857) for Config Mgr 2012 SP2 / R2 SP1, you can request a download here.
If you are planning to move to SP2/R2 SP1 or even installing a new environment you should be aware that Microsoft changed the minimum recommended hardware requirements.
Today i ran into a little problem in a customers SCCM environment. A colleague wanted to reinstall his SCCM Agent because it was not behaving as it should and noticed that the client push, he initiated did not work… so I had a look at the “CCMsetup.log”.
After you upgraded your ConfigMgr to the new Version you need to upgrade both the Clients and the deployed consoles for your IT staff.
In the Installation Media go to [SCCMISO]SMSSETUP\BIN\I386 and copy both “AdminConsole.msi” and “ConsoleSetup.exe” to an Application folder for deployment.
Then you need to create a package or application with content to deploy the new console.
Microsoft released a FAQ on the configuration team blog. Take a look to prepare for your upgrade.