How will it be GPL'ed and not be reversed within 5 seconds? I guess if there was a killer device... supporting it, this would be nice.
Sun is building an open source DRM
http://www.wired.com/news/columns/0,70548-0.html
Sun's White Paper on its DRM
http://research.sun.com/spotlight/20050919_DReaM-Overview.html

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