We are going to set this up for our app, however there's a limit to how useful it is when you are reliant on services such as MongoHQ/PubNub (in our case) that are also affected!
Well, it's not going to be cool or best practice to use cloud services for your startup for the next week or two. Fortunately people on HN will then forget until the next AWS outage and your setup will be fine again.