Adobe has Adobe Camera Raw 6.5 available for download. The Sony NEX-5N and NEX-C3 Raw files are now supported by ACR 6.5, which means the files can be manipulated in Photoshop CS5.
Camera Raw 6.5 update
This new version of the Camera Raw plug-in replaces the original Camera Raw plug-in that was installed with Adobe® Creative Suite® 5 or Adobe® Photoshop® CS5 software.
You can download ACR 6.5 RC from Adobe for Windows or Macintosh operating systems.