Regarding the last question, he means is someone trying to hack the OEM ecu to provide a remap. i.e similar to the ECUTEK for the impreza.
As far as i am aware i only know of one company in the states that do this, however im not too clued up on it. Bigphil obvioulsy is alot more knowledgable on this, maybe best to give him a call if your serously interested in modding the ecu.
Phil - where does it get sent off to?
Phil has his own reliable source, at a great rate too