Not sure if you ever got help, it's been some months, but I figured this would be a burning questions, since I, too, was wondering the same thing. I use Disablecraft for this task. It can disable anything with an ID number, even things like specific colored wool (like Grey Wool is 35:3 and White is just 35). Install the jar (found here:
http://dev.bukkit.org/bukkit-mods/disablecraft/) as a Bukkit plugin and then run your server. Stop the server, edit the config found in its plugin folder and restart your server! That easy! It also has separate permissions to enable certain groups or people to use items, in case you have donators that you want to allow the use of things, but disallow others from use.
Hope I helped!