Got a mail today from Andrew Owen, creator of the, slightly quiet, ZX Spectrum SE project. Well, it seems that during his time in Australia (the reason the project went a bit dead), he's actually been doing some work on "the new machine."
I don't have much info at the moment, but I hope to soon get the new specifications, most of which (with the exception of the 32k video modes) can be bolted onto a TC2048 or a Pentagon. As soon as I have them, I'll post them on the site for all to see. There's also some talk of getting someone to work on hardware emulation of the machine, but I'll get back to that when I have the specs.