Well, I set out with the idea of fixing this script to work with Newzbin2, which I did. I was on 0.5.3 of SAB, and it threw some error about newzbin's response. Fair enough I thought, I'll upgrade SAB since its now Newzbin2, maybe they changed something. I upgrade to the latest 0.5.3RC1, and oh dear, all the Newzbin stuff is gone.
So well, the script is fixed, I'll provide a link soon, but it's really useless until the SAB authors either re-enable or fix the Newzbin code they had.
There's a thread about the Newzbin2 here - http://forums.sabnzbd.org/index.php?topic=4478.0