mms.process do |media_type, files|
  # go through each file
  files.each do |filename|
    # if it's a format we support, create a record
    if media_type =~ /pdf/  # just pdfs for now, to reduce confusion
      File.open(filename) do |tempfile|
        # Somewhere in here I'd like to change filename.content_type
        # to the proper type using mimetype-fu
        # except doing tempfile.content_type = whatever doesn't seem to work.

        thing = Thing.new
        thing.document = tempfile
        thing.save!
      end
    end
  end
end

thing.document_content_type = whatever