I think an "Affero LGPL" would be good to get companies to contribute back library enhancements without "infecting" and thus having to give up their whole IP.

I think an "Affero LGPL" would be good to get companies to contribute back library enhancements without "infecting" and thus having to give up their whole IP. Regarding data portability, I've become a fan of json - it's easy to understand and process, and it forces interfaces to be simple (compared to xml, e.g.).