gistfile1.rb

require 'sinatra'
require 'mechanize'
require 'haml'

get '/' do
  nickname = 'cogumm'
  board = 'nerd'
  url = "http://pinterest.com/#{nickname}/#{board}"

  pin_class = 'PinImageImg'

  @links = Mechanize.new.get(url).search("img.#{pin_class}").map {|i| i.attr('src') }
  haml :index
end

__END__

@@ layout
!!!
%html
  %body
    %h1 Nerd Board
    =yield

@@ index
-@links.each do |link|
  %img{:src => link}