esperanto international sign language

Esperanto should totally be a sign language. If there were an international sign language, the hearing who knew this language could communicate effectively with their hands and simultaneously learn a spoken language and teach their own spoken language. Which would be decidedly awesome.

I got this idea a few years ago and have had occasion to communicate with a few deaf folks about it. There is a relatively rudimentary international sign language in use amongst the deaf community when it becomes relevant to communicate with an international audience, say, at the deaf olympics. Since it's generally a special occasion gathering, the language is slow-growing.