It seems to me that Castle are doing a superb job here - and I'd certainly agree with epistaxsis that (for my mind) this is the future of RISC OS. RO5 is already 32-bit, is gaining features, and is properly owned by those writing it. Not only that, but they're producing top-notch hardware to run it on, providing proper documentation for new users, and overall it feels like Castle has a solid plan to take up the reigns where Acorn left off. They are one of the few things that give me a sense that RISC OS has a future, and they're digging in their heels to get on with it - a lot better than certain other companies, flapping away on the edge of things, full of empty promises and undermining confidence in the platform.
I think what Castle would benefit from now is a more recognisable public image - the shield is a tad 'regal' somehow, and the Iyonix logo is a bit 'nothingy', if you get where I'm coming from. A good logo, representing both themselves as a company and the machines as their product, would go a long way towards producing a really good, recognisable, brand image. I know whereof I speak... I'd love it to be the Acorn nut, but I do think it carries a little too much baggage & unwarranted prejudice - personally I think the logo is a celebration of some superb pioneering technology, but would probably need some careful reconsideration if it were ever to be brought back into use.