The CoPico Centipede interfaces your CoCo with a Raspberry PI RP2350B. It can be used as a software defined I/O board, a programmable timer, RAM... even 'spoon feed' and bootstrap an Operating System automatically. The centipede's top pops off to reveal a 'hat' connector for future mischief, in fact Lostwizard has already cooked up a FujiNet hat! Or build your own, give me a minute to publish 'bingo board'.
You might want to have a look at Henry's release notes or his talk last CoCoFest.
And if you bought a Bonobo, trade up for free! Expect an email...