I, too, bought the mag and enjoyed Michael's article. The immediately preceeding nostalgia article mentions the US Computer History Museum in California, where a quick search showed they have nothing later than BBC micros and early ARMs. No mention of Archimedes, RiscPC, NC, Iyonix, A9, RISC OS.
At least the UK Centre for Computing History has a better collection of Acorn-branded kit but little or nothing RISC OS related from the last ten years.
Perhaps that means it's all still in use and not ready for a museum!