Important reasons for memorizing the fretboard down cold are the ability to know exactly where you are for faster soloing, chord construction concepts will be much easier to figure out and you will probably make a few people jealous because you are so good at it. (you could let them know about this website - maybe :)
Remember most guitarists take years to learn the fretboard notes, if it takes a few weeks you'll be far ahead of most. ( it shouldn't take that long but repetition is the mother of learning.)
A great way to keep you skills up is take a small backpack guitar with you to practice the fretboard diagram system in odd moments, whatever they may be, waiting in the car etc.
Guitar fretboard memorization system - step 5.
Instructions for step 5:
Take one chart at a time memorize it completely and reinforce that with knowledge from the previous cards.