Anyone with a TinyPi interested? price is probably going to be around £4/$5 + delivery (probably included in the UK... probably an extra $/£1 for most countries)
I'm still working some kinks out but my first run prototype came out pretty good:
I will have a range of colours available (though some may have to cost more...)
Probably clear will be cheapest, colours will be slightly more expensive and custom or neon/fluorescent will be a bit more again