Decentralized would be like GNUNet[1].
Decentralized would be like GNUNet[1].
Decentralized can have various definitions; GNUNet is definitely one definition, but you might consider that the web itself is supposed to be decentralized and is designed to be able to be that way, but is moving away from that as more and more of the web is being replaced by megasites like YouTube, Flickr, Tumblr. So, MediaGoblin is one attempt to take back the web in that respect.
I just think that it's unfair to call it decentralized if each instance of it is out there on its own.
Perhaps once federation is working it'd be a more fair comparison, because at least then all the servers can communicate and share with each other.
Don't take this as an attack on your software. It looks nice and I'm sure it works well (I haven't had a chance to use it).
As for how federation will work, we may enable a plugin called "diskgobbler" or something that might dowload files, but no, by default, MediaGoblin will not mirror all files from the other sites it is federating with. :) Instead, the goal is to keep the social side of things alive: you can create galleries that have entries that span multiple sites, favoriting a piece of media can happen across instances, you can subscribe to things a-la YouTube channels. That's what we mean as in terms of what we aim for by federation.
Hope that answered a bit!
http://networkcultures.org/wpmu/unlikeus/resources/articles/...