hello_world.bewbs

%c=qw(XX $p++ XZ $p-- XY D++ YX D-- ZY D&=255;while(D){ YZ D&=255;} YY print+chrD ZZ D=ord(getc) ZX print+join(",",@b),"\n");
$/=$,;$_=<>;s/[XYZ]//g;s/\(\.\)/X/g;s/\[\.\]/Y/g;s/{\.}/Z/g;s/[^XYZ]//g;s/../$c{$&}; /g;s[D]'$b[$p]'g;eval;
=begin comment

/* From: https://gist.github.com/ELLIOTTCABLE/402586 */
/* I wrote “Hello, world!” for whatever mad, mad genius wrote this version of Brainfuck:
            http://pastie.org/private/siw6uoan1cd6shuao7r8hw (dead link)
*/

(.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] {.}[.] (.)(.) (.)[.] (.)[.] (.)[.] (.)[.]
(.)[.] (.)[.] (.)[.] (.)(.) (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)(.) (.)[.]
(.)[.] (.)[.] (.)(.) (.)[.] (.){.} (.){.} (.){.} (.){.} [.](.) [.]{.} (.)(.) (.)[.] (.)[.] [.][.] (.)(.) (.)[.]
[.][.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] [.][.] [.][.] (.)[.] (.)[.] (.)[.] [.][.] (.)(.) (.)[.]
(.)[.] [.][.] (.){.} (.){.} (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.] (.)[.]
(.)[.] (.)[.] (.)[.] [.][.] (.)(.) [.][.] (.)[.] (.)[.] (.)[.] [.][.] [.](.) [.](.) [.](.) [.](.) [.](.) [.](.)
[.][.] [.](.) [.](.) [.](.) [.](.) [.](.) [.](.) [.](.) [.](.) [.][.] (.)(.) (.)[.] [.][.] (.)(.) [.][.]

#{.}[.][.](.)[.]{.}{.}[.]

#   (.)(.)  move memory pointer one right
#   (.){.}  move memory pointer one left
#   (.)[.]  increase the current cell
#   [.](.)  decrease the current cell
#   [.][.]  output the current cell as character
#   {.}{.}  input a byte to current cell
#   [.]{.}  jump back to the corresponding start loop
#   {.}[.]  if the current cell is zero, jump past the corresponding end loop, otherwise continue

#   {.}(.)  output the current state of the storage tape

#[.]{.}

# See also: http://codegolf.stackexchange.com/questions/84/interpret-brainfuck#answer-933

Now polyglot.