We've got a few TB in couchdb-lounge (we also wrote couchdb-lounge) so we think it works. Big pluses ... it's got a RESTful API which means that we don't need

We've got a few TB in couchdb-lounge (we also wrote couchdb-lounge) so we think it works. Big pluses ... it's got a RESTful API which means that we don't need a special library to access it in any language ... if you can speak http you can talk to couch. This is especially important for us because there are lots of places where we like to talk to our databases asynchronously. It's a lot easier to find an async HTTP API than it is to find a random db API.