This is most sad.
I've been trying to justify the purchase of an Iyonix for some time - Though I'd very much like one I guess that's the problem for Castle, now I won't have the chance to buy one (fleaBay aside).
An ARM-based hand-held+ for geeks that's already selling v. well by the looks of it.
Wouldn't a mature, low-overhead, ARM-based (Risc)OS fit this device rather well..?
With it's HAL I assume RO5 could be feasibly ported.
A fresh supply of geeks to develop for RiscOS...
Ok, so the above suggestion may be chock-full of difficulties but where else will RiscOS go for hardware, new developers, & new users..?