>>6
Nevermind, found it at http://dis.4chan.org/read/prog/1185963886/23
Sauce is http://hotaru.thinkindifferent.net/tinybb/tinybb.txt

Of note is the function

sub format_comment($$){}

since the first regexp for comment parsing (which inserts the >>1 links for this script) likes to not work on the random free webhosts I tried a slightly modified version of this script on. (For those who care, I added a rudimentary spam trap [fake input] to the post form.)