On how it's being used:<p>"We're not about to drop PostgreSQL as our primary data storage layer, but Riak seems to make a great complimentary datastore . . . "
A key-value store written in Erlang, stores JSON and executes MapReduce queries, and is accessible as a web service.<p>Why no mention of CouchDB and how Riak differs?
Another key/value store?
I'm sure it has its own specific advantages and disadvantages which make it different from all the others.
Still, there's a lot of those popping up lately...