Inventory settings are site wide yet there are times when you want a class of hardware inventory collected for all machines EXCEPT a few (for example, some kiosk machines where many folks are logging in with new and separate profiles).  To handle that there is a handy write-up at http://myitforum.com/cs2/blogs/skissinger/archive/2009/07/03/selectively-disable-ccm-recentlyusedapps-per-client.aspx that will allow you to disable certain inventory classes only on select client machines while leaving it enabled for all other machines in that site.

Handy Eh?