Sharing rich media: too little and too big

iCommune is a program that lets iTunes users share songs over the internet. (via Euan Semple
Which is very nifty — as long as both people have iTunes.
Meanwhile, Marc Canter argues in favor of universal broadband content standards. He argues gamefully about the benefits to:
* On-line media storage systems
* Media management systems
* Media tools, devices and playback systems
* Online communities
But each of these players has more interest in proprietary models than common standards.
It will take some sort of mass decentralized application (like blogging) to drive standards againsts the interest of the existing vendors