Well I have enjoyed (and continue to), my Iyonix (one of the first batch sold to the public) so I hope that Castle and its subsidiary companies managed to make money from the exercise. When it was released, it was the machine we all said we wanted (remember the miracle that 32-bit RISC OS represented at that time, for instance) but I fear less people bought it than had said they wanted it; the inevitable price premium of low-volume manufacture versus Far-Eastern PCs didn't help either.
Sadly rjek's comment about lack of grunt becomes more true with every year that passes (hard to believe that my machine is coming up to its 6th birthday) but it still does some things perfectly well. The demands of modern web sites/browsers is an especial issue for me. As I said, it's been a fun ride so far.