Quick, slow, dirty way to verify how aged your gems are.

maintenance.rake

task :outdated => :environment do
  include ActionView::Helpers::DateHelper
  regexp = /\* ([^ ]+) \((\S+) > ([^)]+)\)/
  outdated = `bundle outdated`.scan(regexp)
  outdated.each do |gem_name, available, current|
    data = JSON.parse(`curl --silent https://rubygems.org/api/v1/versions/#{gem_name}.json`)
    version = data.find { |e| e['number'] == current }
    age = distance_of_time_in_words_to_now(Time.parse(version['built_at']))
    puts "  * #{gem_name}: (#{available} > #{current}, built #{age} ago)"
  end
end