I second this wholeheartedly!
Since there has not even been a short reply from the makers, developers and maintainers of the YRG, I want to elaborate. YRG team, please do not get the following wrong! The YRG is a very amazing thing, it is a godsend especially for MIDI control - at least for anybody like me who does only play stringed instruments. But this very weird fret spacing is a show stopper. I believe that is what is nagging us, bob1471.
Take a look at
http://www.flickr.com/photos/fatcatpeter/6666039153/in/set-72157628790858143. You will notice that the fingerboard of the YRG has almost the same length as the fingerboard of the Strat. It is the fret spacing that makes you feel like you have never played on a guitar before

. Close your eyes and try to play something - odds are that you will start with a lots of full misses.
To pick up bob1471's very reasonable suggestion/request:
What about an optional neck with standard fret spacing? Here some reasons to consider (I played the devil's advocate and made a few additions):
1. StandardsExperience the magic of a standard in action: After you learned how to play the guitar you can pick up any guitar and you can play on it - with your eyes closed. Based on a (fairly) standard fret spacing, fingerboard width and height. This is even true when you switch between different types of guitars, like electric, western or classic.
The Devil's Advocate's comment:
So far, the YRG has been the only guitar to break this magic. Hint: Never brake magic when it comes to human beings and music.
2. Habit Knowing out of habit (practice) where to place your fingers enables you to tackle the music factor of guitar playing. It means that your more and more are less fighting with the instrument itself. And making more music at the same time.
So here's the Devil's Advocate's question that probably deserves an honest answer (at least from marketing):
What good does it bring to make guitar players getting used to a different fret spacing? Breaking habits might be good as a therapy. But here it actually means turning back the clock and restart fighting with the instrument - instead of making music. Especially when you are a fan of bending strings (make your guitar sing and scream), now and then you will want to pick up your regular guitar - and - wham. Here we go with a different spacing. Then you go back to your YRG - and again, adjust when there should be absolutely nothing to adjust about.
3. Motivation and funThe YRG is all about fun and motivation. Full stop.
Right, I learned that first-hand when I handed my YRG over to my beloved one. She put the headphones on and there she went, having genuine fun with a guitar. She never touched any of my guitars before. So there is a lot about the YRG.
And this is the thing about the fret spacing - for somebody like my beloved one, the non-standard fret spacing is no problem at all. On the contrary, it supports her playing with/on the instrument. She might get better and better, maybe starting to love guitar playing. So, mission accomplished! Really?
What about the next step, switching to another guitar. Uuuuh, bummer. Time to re-learn (see Reason 2.).
Now, let's take a look at the motivational aspect of the YRG fret spacing when a guitar lover is concerned. Frankly speaking, being forced to literally 're-learn' an instrument that one might love deeply to play is not motivating, at all!
The Devil's Advocate's comment:
In combination with the things that come with the YRG concept one has to observe and get used to, the YRG fret spacing is not really adding to the fun.An optional neck with standard fret spacing could turn the YRG into just another guitar, as far guitar playing (placing your fingers on the fingerboard) is concerned. Which would be a very good thing. Because although the YRG has some very strong sales points, the 'competition' is truly overwhelming. Well, guitars with standard fret spacing make about 99.99999% of all guitars. Standards tend to prevail, supported by habits.
Besides, that optional neck could make the YRG a true replacement guitar, truly "practice-friendly". In addition, students could use it to learn playing the guitar, any guitar.
And as bob1474 pointed out, the neck is detachable, so changing the neck and turning the YRG into a serious guitar would just take a few seconds.
So, YRG team, any chances to see an optional YRG neck with standard fret spacing in the near future?