Hi, the Tab only got an IP address via the N900 when that ip_forward line was uncommented. Prior to that, pairing and 'connection' was completed but without an IP being provide.

I used jschan's tethering script here:
http://talk.maemo.org/showpost.php?p...&postcount=124

You can see here:
# Enable IP forwarding
#echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/conf/$INTERFACE/forwarding
echo 1 > /proc/sys/net/ipv4/conf/$EXTERNAL_INTERFACE/forwarding

That it was commented out.

I tried your initial script right back on page 1 of this thread but it didn't work, although that does have the ip_forward line uncommented.

Hope that helps.