The NeoMagic MiMagic 5 is a low power, small form factor multimedia processor based on the ARM 9. It's 220Mhz and has inbuilt support for vdieo and a variety of peripherals. Sounds ideal for a small portable device?
Castle will be demonstrating RISC OS 5 running on the NeoMagic MiMagic 5 at the Midlands show next weekend.
Link:
Press release