I've tried a few cheap PS2-USB adapters and they work fine on my A1200 (through the Subway) and my Aros boxes. One adapter came with a steering wheel controller I bought. It's just a shame they can't be used in regular, old Amiga games on the classic Amiga but they're great for emulation on the PC, and work fine in system-friendly games like Doom. I haven't tried it yet, but you could probably run Tracker Hero through UAE and use a guitar controller with it, they do work with these adapters too.