The current plan to share files between locations and provide an off site backup of the broadcast quality MPEG2 is to move the files to Archive.org using the advanced interface to their Contribution Engine. Due to the size of these files, users will be able to configure when these transfers happen (ie. from 1AM-4AM) or tigger an immediate upload.
Because Archive.org only stores a subset of metadata required by the Open Media modules, the entire metadata record would also be transferred to a centralized database as well. The location of the broadcast quality MPEG2 would be stored in this central database as well. In theory this approach would support multiple offsite storage/sharing options like Amazon S3, Internet2 SAN, a commercial solution offered by one of the playback server vendors, or even a more P2P based approach (if stations opened up ftp/http access to a mirror of their RAID or some other configuration like that).
The central database will give stations (and potentially the public) the option to search the entire library of shared content. By tracking the correctly registered Creative Commons licenses, stations will be able to confidently rebroadcast (or even remix if the license allows that!) the content that has been shared.
Any feedback on this strategy would be greatly appreciated!