Ah nothing like having a load of other things distracting me away from the project. Anyways, I recently started working on schematic of the deluxe version. I was first thinking about doing a p-channel MOSFET for reverse polarity protection, but then I wanted something simpler and cheaper. I then thought about doing a reverse-biased diode and fuse. I wanted to use a resettable fuse but didn't find exactly what I was looking for in terms on an inexpensive smd one with a reasonable voltage and current rating.
I then decided to simply use a Schottky diode but once again I'm browsing Ebay tonight and may settle for a thru-hole resettable fuse. Anyways, here's the last revision of the schematic that I did, sure to change of course.