Installation:

gem install read_later

Here is an example Sinatra application to get you going:

require 'rubygems'
require 'sinatra'
require 'read_later'

before do
  @read_later = ReadLater.new
end

get '/instapaper' do
  url   = "http://writing.bryanwoods4e.com/1-poor-poor-child"
  title = "Poor, poor child. You have no idea."

  # See lib/read_later.rb for more Instapaper configuration options 
  @instapaper_button = @read_later.instapaper_button(url, title)
end

get '/readability' do
  # Readability's button is pure JavaScript. Nothing fancy here...
  @readability_button = @read_later.readability_button
end