Strange, I was just researching the forums on just this topic. Here's my notes/ideas:
For actually using a front plate, there are plenty opinions. Some cops won't bother, some will. Some don't want the extra reason to be pulled over, others will just pay the fine as a non-moving violation. Some get a retractable plate, which looks fun and gets the plate centered, which I prefer.
Personally, I'll likely just get the tow hook and replace the hook with a license plate mount and keep it in the trunk or use as needed. Maybe someday get a centered retractable one.
threads:
DIY: Show-n-Go Front License Plate Install (Grill Location)
DIY: Power Retractable Front License Plate Install
Maoweraxle.com tow hook license plate bracket
products (I don't speak that these are proper; just links I've collected):
STILLEN No Drill Licence Plate Relocator | STILLEN
Nissan - GoMiniGo-Home of Innovative Products for your car
Performance Auto Parts Warehouse, Installation, and Dyno Tuning | PTUNING.COM (877-788-6464)
Rho-plate
Show-N-Go Remote Control Electric License Plate Frame