applemail_trello.rb

#!/usr/bin/env ruby

require 'trello'
require 'appscript'
include Trello
include Appscript

# There's a little setup involved here.
# Step 1. Get Your Application Key from here:
# https://trello.com/1/appKey/generate
public_key = ""

# Step 2. Get Your Token to Approve Your "App" from here:
# https://trello.com/1/authorize?key=YOUR_APPLICATION_KEY_FROM_STEP_1&name=SOME_ARBITRARY_NAME&expiration=never&response_type=token&scope=read,write
member_token = ""

# Step 3. Set up misc. variables
board_name = ""
list_name = ""
username = ""

# Nothing too user-serviceable down here
mail = app("Mail.app")

Trello.configure do |config|
  config.developer_public_key = public_key
  config.member_token =  member_token
end

user = Member.find(username)
board = user.boards.select { |b| b.name == board_name }.first
list = board.lists.select { |l| l.name == list_name }.first

messages = mail.selection.get

messages.each do |m|
  card_title = m.subject.get
  id = m.message_id.get
  content = m.content.get
  message_content = "message://%3c#{id}%3e\n\n#{content}"
  card = Card.create(:name => card_title, :desc => message_content, :list_id => list.id)
end