Comment.find(:all).select {|c| c.body.include?("[...]")}.each do |comment|
  t = Trackback.new(:url => comment.url, :title => comment.author, :excerpt => comment.body)
  t.save
  t.article = comment.article
  t.created_at = comment.created_at
  t.save
end

# We're converting an existing blog, so everything in there is ham
Feedback.find(:all).each { |f| f.mark_as_ham! }

# Destroy the old comments
Comment.find(:all).select {|c| c.body.include?("[...]")}.each { |c| c.destroy }