Or they don't have anything of value that they haven't released. The idea that's he's sitting on something valuable to protect himself seems questionable to me

Or they don't have anything of value that they haven't released. The idea that's he's sitting on something valuable to protect himself seems questionable to me considering he's pretty much a prisoner in an embassy for the forseeable future. I suspect Assange's ego is way to big for him to sit on anything 'juicy' for very long. He needs to keep himself and wikileaks relevant. Also they have the ability to spread information as they see fit. See his various leaks for example. Assange isn't hosting an ftp for everyone at the embassy. This stuff goes out via torrents, mailed drives to journalists, and via Assange's army of helpers.