gistfile1.rb

class UnwireController << Controller
  def create  <-- incoming message
    IncomingMessageUnwire.create(params)
  end

  def update  <-- delivery notification
    OutgoingMessageUnwire.update(params)
  end
end

class IncomingMessage << ActiveRecord
  belongs_to:gateway_accounts

  after_create :perform_action

  def perform_action
    # Perform action based on message (Newsletter, Contest, Game, etc.)  
  end
end

class IncomingMessageUnwire << IncomingMessage
   def self.create
     # Parse params and create incoming message
  end
end

class OutgoingMessage << ActiveRecord
  belongs_to:gateway_accounts

  def send_message
    # HTTP request
  end
end

class OutgoingMessageUnwire << OutgoingMessage
   def self.update(params)
     # update message delivery status
   end
   
   after_create :send_message
   
   def send_message
     # marshal self into form data 
     super(form data)
    end
end

class Gateway << ActiveRecord
   has_many :gateway_accounts

   # Contains information about each gateway
   # Name
   # Outgoing URL
   # Callback URL
   # Etc.
end

class GatewayAccount << ActiveRecord
  belongs_to :gateway
  has_many :incoming_messages
  has_many :outgoing_messages
  
  # An actual gateway account that a customer owns
  # Identified by <shortcode, keyword>

  def send_message(recipient, message, options = {})
    # Somehow figure out which OutgoingMessage to create
    # After creation the message will send itself.
  end
end