Thanks Mayfly. The gist seems to me 1. that it will take several months, at least, to resolve, and 2. segregated does not seem to have any significance if the money is not there any more (as per Maxwell, Crown and Farepak), so clients' claims go in the pot with everyone else's.
My take on this is that the disappearance of client funds is a black swan event so little anticipated that it caught out even many sophisticated futures investors. Will a government/fsa backstop a casino industry? The topic is covered little in the media, but, as the penny drops, I think it will deter retail people from keeping any significant amount with brokers and spreadbetters, so the volume of business falls and the companies' cash levels fall.
Simon Cawkwell on advfn board disagrees, though I note that advfn have removed the whole thread on this topic. Advertisers? Lawyers? who knows.