After looking more closely I dont think that will work for multipage threads
You could do this:
Code:
$bburl/showthread.php?goto=newpost&threadid=$threadid
But that would just take them to the last post in their thread.
Maybe something like this would work:
Code:
$bburl/showthread.php?goto=newpost&threadid=$threadid#$postid
Im just guessing now, but hopefully one of those will work for you.
~Chris