At this moment the latest version available is Intel(R) Rapid Storage Technology 11.7 which supports up to Windows* 2008 server edition. You can keep checking for new releases for Intel(R) Rapid Storage Technology at http://downloadcenter.intel.com/default.aspx
It's curious that Version 22.214.171.1240 (released on 09/13/2012) states that it supports the following operating systems:
Windows Server 2008 *, Windows 7 *, Windows 8*, Windows Server 2008 R2*,
Windows Server 2012*
However, the readme file and release notes do not mention Windows Server 2012. Is this just a mistake on Intel's website, or does this actually work? Version 11.7 does not mirror this compatibility list.