Thanks for the link, Dragon, I thought you were talking about some special cable or something, I didn't realise it was something that pricey. Looks tidy and sounds neat, but well out of my range!
BTW, this is the one I purchased, you get an Arduino with GRBL firmware preloaded, a CNC shield, and even the full set of stepper motor drivers with heat-sincs - All for £15.
I've not actually tried it yet, so I'm hesitant to say anything about it for now, other than it's looking good cause I believe both the hardware and the software are open source. I don't know if it does that feedback thing, but if you check the specs at the link, it sounds quite capable and they're always adding stuff to the firmware.
Anyway, if it turns out to be crap, I'll just blame Gav' even though I'd bought it before he mentioned it to me. Sometimes it's just handy and fun to have someone to blame other than myself
Seems pretty cool, although I doubt it does that fancy tones thing Johannes mentions, it's probably just beats, but as long as it works, that's cool. I intend to CNC some prototype designs for completed products, and if I can create a nice repeatable, stable system that would work in a realistic time-frame, I might even be able to use it for small production runs. It's CNC after all, it's designed to be accurate and repeatable - so we'll see.