I, too, am interested in the KSG but how long before it's reliable, affordable and *available*?
'Till then, there's another bullpup shotgun design based on the 870 (that should be Kali-legal) so I'm going this route for now:
http://www.bullpupunlimited.com/
Reports from users at the Bullpup Shoot have been very positive.
Tomac