Of course they could fail. Building a board and putting someone else's chip on it it easier than building your own ASIC from scratch. We saw that happen to bASIC, they delivered FPGAs, but later failed to deliver on a subsequent ASIC project.
Many in the community thought Butterfly Labs would be a scam, but they delivered (eventually), on their promises.
If you don't want to risk money in a pre-order buy a 28nm miner from Technobit with PayPal, but even he gets scammer accusations!
It's just the nature of the Bitcoin market... More risk, more reward!
Photos of Flappysocks previous order with Black Arrow.
https://bitcointalksearch.org/topic/m.3866034
Photos from inside Black Arrows factory in China.
https://bitcointalksearch.org/topic/m.3884729
Photo of Black Arrows 22nm FPGA to ASIC development board.
https://bitcointalksearch.org/topic/m.3893629
"Re: Butterfly Labs CEO 25 Million USD Mail Fraud — A Concise Summary of Evidence"
https://bitcointalksearch.org/topic/re-butterfly-labs-ceo-25-million-usd-mail-fraud-a-concise-summary-of-evidence-110805
"TOWN HALL (prep) Meeting: Butterfly Labs"
https://bitcointalksearch.org/topic/town-hall-prep-meeting-butterfly-labs-110786
"The "What Black Arrow does not want you to know" thread"
https://bitcointalksearch.org/topic/the-what-black-arrow-does-not-want-you-to-know-thread-313049
"Black Arrow Software real or fake?"
https://bitcointalksearch.org/topic/black-arrow-software-real-or-fake-365535
"Blackarrow Software Legit or Scam?"
https://bitcointalksearch.org/topic/blackarrow-software-legit-or-scam-339163
"Re: "BlackArrow" ASIC's, Trustable?"
https://bitcointalksearch.org/topic/blackarrow-asics-trustable-316214
Thanks for the great list of sources. I agree that this does look like bfl but from what I've read BA has a much better track record of shipping on time. I'm hoping for less than 1 month delay. Or at least before asicminer gen3 chips go up for sale.