$ mongrel_rails cluster::start
(mongrel running on 8830 and 8831)

lighty config

$HTTP["host"] =~ "bloction.com$" {
  proxy.balance = "fair"
  proxy.server = ( "/" =>
    (( "host" => "127.0.0.1", "port" => 8830 ), ( "host" => "127.0.0.1", "port" => 8831 ))
  )
}