An answer to mithos28's question in http://racket-lang.org/irc-logs/20130201.txt at 2:19

gistfile1.rkt

#lang racket
(require unstable/sequence)

(define los (list '(1 2 3) 
                  '("a" "b" "c")))
  
(define (f elts)
  (format "I see: ~s" elts))

(define result
  (sequence-lift f
                 (in-values-sequence (apply in-parallel los))))

;; Under Racket HEAD (2e8ffe74002e3de0a929c8786ac683e509dc2494)
;; you won't need to do the in-values-sequence stuff, but
;; should be able to say this more directly:
;;
;; (define result (sequence-lift (lambda args args) (apply in-parallel los)))
;;
;; where, under HEAD, sequence-lift knows how to deal with multiple values

(for ([x result])
  (displayln x))