This is good news indeed as it means that people will be in a position to upgrade to an Iyonix with the least amount of "financial" pain.
It also means that the A9 won't be the only small form factor RISC OS machine. Ok, the Aria Cube is bigger than the A9 - but then it *does* have an expansion slot, a faster processor, twice the RAM and a built in CD-RW drive whilst the A9 does not. Pricewise given the Aria Cube's spec it looks like good value.
Also the fact it is using the existing Iyonix motherboard means that it's not as if it's a new and untried product.
Castle needed an answer to the A9 - and this seems to be it, and arguable a good repost it is too.