mavhc > Well MD say they're shipping so I'd imagine 10's if not hundreds of people have them by now (unless MD's definition of "shipping" means something different !).
Julian> And how will programmable logic allow you to turn a 32bit/33MHz PCI slot into a 64bit/66MHz one ? It doesn't - so there are limits to Omega expandability too (and I'd point out that the Iyonix already *has* 64bit/66MHz PCI).
As to xScale, that is an future *option* for Omega, whereas Iyonix users have it *today*. There is also the little matter of the xScale being 32bit only and RISC OS 4 being strictly 26 bit - so what sort of performance hit will "ArmTwister" make in resolving that (if and when it finally arrives).
I suggest Martyn's point stands, when you change a motherboard you get not only a new CPU, but also faster I/O devices, faster memory and so on - the sort of things the FPGA's in Omega will do nothing about.....