Fiberfix Kevlar Spoke
These little wonders will save your butt when you break a spoke on the road. They're a kevlar cord wound around a block and tackle mechanism, that goes through the spoke hole in your hub and tensions your wheel back into true.
It takes about 5 minutes to install, and it will stop your wheel rubbing your brake pads (or your frame), making it a real ride-saver.
This product is from the USA (otherwise we'd call it the Fibrefix!)