Thanks :)
Unfortunately, as stated in the first paragraph, or perhaps in the __DATA__ section, this will be a tougher nut to crack than something like the vigenere cipher. Also unlike my obfuscated vigenere, I didn't wait to post this one until I had a Playfair cracker mostly ready to go... but I'm definitely planning on writing a playfair cracker, unless someone beats me to it ;)
--chargrill
$,=42;for(34,0,-3,9,-11,11,-17,7,-5){$*.=pack'c'=>$,+=$_}for(reverse s
+plit//=>$*
){$%++?$ %%2?push@C,$_,$":push@c,$_,$":(push@C,$_,$")&&push@c,$"}$C[$#
+C]=$/;($#C
>$#c)?($ c=\@C)&&($ C=\@c):($ c=\@c)&&($C=\@C);$%=$|;for(@$c){print$_^
+$$C[$%++]}
