Jersey law is driver's side and rear-view mandatory, passenger side if the rear-view is blocked. I've gotten no problems from my passenger delete (though it really just looks like accident carnage at the moment).
An internal mirror would serve the same purpose, but I'd prefer the outside view and position adjustment that could come from an external video mount. Heck, if I could hook up the existing electric controls to change viewing angle...
Found this site for a rather convenient argument for video over mirrors (at least for those who prefer to allow computers to think for them):
LINK