This is funny. There are many scams, but so far there is nothing to suggest KNC is a scam, infact, quite to the contrary.
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Then you didn't read the complete bullshit in their very first post:
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We will in the upcoming weeks opening our order book to allow the purchase of our first set of ASIC miners. They are in the early stages of development now and will be ready in the summer of 2013 (yes in just a few months)
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They never take a single cents from us ... not like butterfly who took the money for a year and no delivery.. if they is delivery at all?
Yeah this isn't so bad. I'm considering ordering.
Edit: But just considering it. This 'first come first served' business could also be an elegant and effective way of scamming lots of people in one go.
It would be nice if they shipped a batch of 5 or 10 to respected forum members a week (or some set period) before opening payment to those with preorders. The interest this would generate would be tremendous, people would start raising money for group buys, and those who order will feel safe while doing it, and investors who can't risk a lot of capital won't be discouraged.
At the moment, normal people will be scared off by the possibility of a scam- and it would be a missed opportunity to expand the bitcoin mining community if payments are accepted without absolute certainty of a product. A period of confirmation would delay shipping by a few days, but this would be a good time for the company to accumulate units in preparation for a simultaneously sold-out first and second batch in the moment this period finishes.