[morb]

You could use dnsmasq for your LAN. That way you can just use the hosts files as they are.

If it really has to be bind, check out this page for a tutorial on blocking using bind: http://www.malwaredomains.com/?page_id=6

Then just use awk to go from hosts file format to this: http://mirror2.malwaredomains.com/files/spywaredomains.zones

Hope that helps.