So I prototyped, in Perl of course, over 4 weeks a complete reliable TCP/IP messaging system with specific characteristics suitable for our requirements (global private WAN carrying billions of dollars of trades per day) and modelled service lookup, error detection and correction, and a complete hub system - got grilled about the work by 5 head-honchos from the biggest potential users, and they report a couple of "key risks" of the prject as being