I actually upgraded CVSI for Visual Studio 2012 towards the end of last year, however I never published it because I couldn't work out how to make a single .vsix support both VS2010 and VS2012 so I could upload it to the Visual Studio Gallery.
I'm happy to email you (or upload) a preview .vsix that you can try out and let me know how you go. Since there is still interest in CVSI, I'll try to find some time over the next few weeks to get the updated version up on the gallery.
Edit 2014-05-25: I've released 0.5.0 with support for Visual Studio 2012 and 2013, you can download them here: http://jonorossi.com/projects/cvsi/