having trouble with bubblewrap

bw.rb

#directory_controller.rb
class DirectoryController < UIViewController
  def viewDidLoad
    super
    self.title = "Directory"
    
    @table = UITableView.alloc.initWithFrame(self.view.bounds)
    self.view.addSubview @table 
    @table.dataSource = self  
    @table.delegate = self
    
    Person.get_people do |people|
      @data = people
    end 

  end

  def push
    new_controller = PersonController.alloc.initWithNibName(nil, bundle: nil)
    self.navigationController.pushViewController(new_controller, animated: true)
  end

  def initWithNibName(name, bundle: bundle)
    super
    self.tabBarItem = UITabBarItem.alloc.initWithTabBarSystemItem(UITabBarSystemItemFavorites, tag: 1)  
    self
  end

  def tableView(tableView, numberOfRowsInSection: section)
    @data.count
  end

  def tableView(tableView, cellForRowAtIndexPath: indexPath)
    @reuseIdentifier ||= "CELL_IDENTIFIER"

    cell = tableView.dequeueReusableCellWithIdentifier(@reuseIdentifier) || begin
      cell = UITableViewCell.alloc.initWithStyle(UITableViewCellSelectionStyleBlue, reuseIdentifier:@reuseIdentifier)
      end

    cell.textLabel.text = @data[indexPath.row]['first_name'] + " " + @data[indexPath.row]['last_name'] 

    cell
  end
  
  def tableView(tableView, didSelectRowAtIndexPath:indexPath)    
    @detail_controller ||= PersonController.alloc.init
    @detail_controller.selected_person(@data[indexPath.row]['id'])
    self.navigationController.pushViewController(@detail_controller, animated:true)
    tableView.deselectRowAtIndexPath(indexPath, animated:true)
  end
  
     
end

### person.rb
class Person
  
  PROPERTIES = [:first_name, :last_name, :id, :function, :phone, :email, :pic_url]
  PROPERTIES.each { |prop|
    attr_accessor prop
  }

  def initialize(hash = {})
    hash.each { |key, value|
      if PROPERTIES.member? key.to_sym
        self.send((key.to_s + "=").to_s, value)
      end
    }
  end
  
  def self.get_people(&block)
    BubbleWrap::HTTP.get("http://vaynernet.com/api.json") do |response|
      @ppl = BW::JSON.parse(response.body)
      block.call(@ppl)     
    end
    # [{"id"=>10, "admin"=>true ... "last_name"=>"Bauch", "twitter_uid"=>nil, "avatar_file_name"=>"photo.jpeg", "updated_at"=>"2012-08-03T18:41:34Z", "first_name"=>"Sam", "start_date"=>"2012-08-03"}, ....]
  end    
  
  def self.find(id, &block)
    BubbleWrap::HTTP.get("http://vaynernet.com/api/#{id}.json") do |response|
      @person = BW::JSON.parse(response.body)
      block.call(@person)
    end
  end
  
  
  
end