Spotty Process: Get all instances of a given type

response.js

// Request using instance API names defined here: http://aws.amazon.com/ec2/instance-types/
// curl http://spot.arfon.org/instances/m1.large
// Example response below

[{
  "availability_zone": "us-east-1d",
  "current_price": 0.066,
  "id": "50b196d2a2fc8eef10000048",
  "name": "m1.large",
  "pricing_history": {
    "2012-11-23 20:04:29 UTC": "0.066000",
    "2012-11-24 20:06:06 UTC": "0.066000",
    "2012-11-25 20:06:27 UTC": "0.066000"
  },
  "product_description": "Windows (Amazon VPC)"
}, {
  "availability_zone": "us-east-1a",
  "current_price": 0.026,
  "id": "50b196d2a2fc8eef1000004d",
  "name": "m1.large",
  "pricing_history": {
    "2012-11-23 20:04:27 UTC": "0.026000",
    "2012-11-24 20:06:02 UTC": "0.026000",
    "2012-11-25 20:06:25 UTC": "0.026000",
    "2012-11-26 20:09:23 UTC": "0.026000"
  },
  "product_description": "Linux/UNIX"
}]