Generate Sexy Primes

MATLAB 32

i=1:n;i(isprime(i)&isprime(i+6))

n is your number

J, 34 33 31 32 39 37 characters

s=.[:(,.-&6)[:I.1([:*/p:)"1 i.,.6-~i.

Lost a character keeping both primes below the limit...and another 7 declaring a function.

Usage:

   s 100
11  5
13  7
17 11
19 13
23 17
29 23
37 31
43 37
47 41
53 47
59 53
67 61
73 67
79 73
89 83

Edit

Seems like a lot of the new answers are not creating functions, taking input or limiting both numbers in the pair to be below n - if I ignore those restrictions too I can get down to 28 characters:

(,.6&+)I.*/"1[1 p:(i.,.6+i.)

Mathematica, 35

{#,#+6}&~Array~#~Cases~{__?PrimeQ}&