npowell@malaise:~$ cat test.txt
hai
hai
hai
hai
hai
hai
hai
hai
hai
hai
hai

==

(ns test
  (:use [clojure.contrib.duck-streams :only [reader]]))

(def foo (line-seq (reader "test.txt")))

(println (map #(str %1 " werld!") foo))


==

npowell@malaise:~$ clojure test.clj
(hai werld! hai werld! hai werld! hai werld! hai werld! hai werld! hai werld! hai werld! hai werld! hai werld! hai werld!)