This is Couchbase's (Couchone, Couchio) hosting service that has been spun off. It has the same platform, same servers, same employees running Iris Couch, but separate from Couchbase.
It would be nice to see some details on where this is hosted on their site, so hosting for an accompanying app can be chosen to minimise latency. Seems to be on EC2, but which region/zone? Are there plans to move to other EC2 regions or even hosters?
Thanks, I'll add a FAQ about location, latency, etc. after some sleep.
It's EC2 us-east at this time although we'll probably be evaluating alternatives soon. But moving off EC2 is a big step because so many people are there.
I wasn't suggesting moving away from EC2, but you might consider also going to places like rackspace, joyent or local/regional providers to offer their customers low-latency connections
Link: http://blog.couchbase.com/easy-couchdb-with-iris-couch