Capistrano - Tail log

capistrano-tail-log.rb

desc "tail production log files" 
task :tail_logs, :roles => :app do
  trap("INT") { puts 'Interupted'; exit 0; }
  run "tail -f #{shared_path}/log/production.log" do |channel, stream, data|
    puts  # for an extra line break before the host name
    puts "#{channel[:host]}: #{data}" 
    break if stream == :err
  end
end

Install it in your shell instead of on each project:
http://streaming.nfm.id.au/getting-started-with-system-wide-capistrano-r/