I've spent some time working on a stupid simple script that would install latest snapshot of VIM along with janus and my additional plugins. It's really easy to get started, to install simply run:

$ curl -L https://github.com/battlemidget/vimntu/raw/master/vimntu | bash

You get all the modifications from janus in addition to an extensive set of plugins activated through pathogen that gives extensive support to most of the major programming languages.