;; Presented with just about as much Perl as the OP . . .
(ns sumcols
  (:use [clojure.contrib.str-utils :only (re-split)])
  (:use [clojure.contrib.duck-streams :only (read-lines)]))

(defn sumline [acc line]
  (loop [a acc l (map #(Float. %) (re-split #"\s+" line)) idx 0]
    (if (empty? l) a
      (recur (assoc a idx (+ (get a idx 0) (first l))) (rest l) (inc idx)))))

(defn sumcols [filename]
  (loop [acc {} lines (filter #(> (count %) 0) (read-lines filename))]
    (if (empty? lines) (vals acc)
      (recur (sumline acc (first lines)) (rest lines)))))

(println (sumcols (first *command-line-args*)))