Chris, Aaron (speybum) Reimer is the MASTER of the woven fly.
He put on a demo for the folks on Friday evening before the Sandy River Spey 'Clave. Glad I video'd the whole thing. Simple, simple, simple ... but he has the hands of a JediMaster.
Aaron also gave lots of advice on materials to use, etc. Drop him a PM, he's a stand-up guy about sharing.