I don't think I see the problem here. This happens in almost every industry in the world... Tiffany bracelets, Coach purses, iPods, etc... There is always a person/company that pioneers something and becomes successful, then other companies will make a quality product, that is very similar, and charge less money for it. I don't mind it... it helps people who can't (or don't want to) afford the original get these products in their hands.
I think that JB is actually doing a heck of a service here.
The people who want, and can afford, a Justis case will pay the price and wait however long the turn time is to get an original one. Nobody is going to loose any business because of this.
The people who like the Justis style, but either need a case very soon or can't afford an original, might be able to pull the trigger on a case of the style that they have been admiring, but have not been able to obtain, for quite a while. If having an original Justis means something to them, they will end up getting one later anyway.
For the people who can't afford a custom case at all, they might just see JB's step-by-step video and give it a try themselves. How cool would it be to get a compliment on your case, then be able to tell that person that you actually made it?! Who knows... JB might end up creating a couple more case makers through this process (the more competition there is in the market, the better it is for the consumer). Plus, we would get to enjoy the photos of the home-made cases posted in the gallery forums!
For the record, JBs post is not a bait and switch. He clearly states that they would be made available at $300, as a semi-production model, in the future. An extra $175 for the same case built solely by him, with his signature on it, is more than reasonable... especially if you are a collector.
If anyone has a problem with this, then they have a problem with business in general. Competition lowers prices and tends to breed innovation. This is a good thing for consumers.