People talk a lot nowadays about cloud computing. When put in the strictly algorithmic context, there may be many targets and obstacles, still to be reached and dissolved. In terms of the way information is traded between human brains and nurture cultural environment in that process however, the "cloud" has already arrived, if without a resounding fanfare or a vengeance.
When I write this journal, for example, I put the resulting chunk of words into the internet, which the kind-hearted people access and read each day. It may seem a small thing, and it is a small thing in the context of human civilization as a whole, but the trading is here and now, where the like-minded are shrouded by a common medium materialized by the daily communication of information.
The Amazon kindle automatically archives issues of periodicals on the web, relieving the machine of the need to store incrementally heavy information. This is a particularly explicit instance of cloud computing. A similar process is already here for the human brain.