Need ideas for salesforce mode

[jmckitrick]

I'd like to use mavensmate as a backend for salesforce.com project compilation 
and deployment.  It's a python module that uses json for commands.  This would 
be a replacement for the Eclipse Force.com plugin.

Is there an emacs mode already out there that follows a similar model of 
calling an external program for compilation, handles a json response, and 
allows access to some project-management features?  I know about 'make' 
support, but I'd like to start as simple as possible, just to get things up and 
running.