<?php // Quick.  Dirty.  Works.
$raw = file_get_contents('changelog'); // svn log -r new:old > changelog
$changes = explode('------------------------------------------------------------------------',  $raw);
$changes = array_reverse($changes);
$changes = preg_replace('/.+r([0-9]{4}).+\n(.+)\n/s', '[http://trac.wordpress.org/changeset/$1 $1]: $2', $changes);
foreach ($changes as $change)
        if ( trim($change) ) {
                $change = preg_replace('/[#]([0-9]{4})/', '[http://trac.wordpress.org/ticket/$1 #$1]', trim($change));
                echo "*$change\n";
        }
?>