Yet another all-business class carrier from London to NYC fails. Seriously, this is about the tenth or so in the past five or six years.
What this tell us, at most, is that businesses aren't as willing to pay for premium fares but given the abysmal track record of all-business carriers I don't think its says that much.
As for mergers, United and Continental I could see, American and USAir not so much (American has some substantial issues it has to deal with internally first, such as the glut of older planes it needs to replace). Also, USAir was just recently the result of a merger, so methinks the feds won't look too kindly on it. Whereas, United and Continental, like Delta and NW, are strong in different areas of the country/international routes and so a match is easier to see.