I'm using some Cisco CLI commands to get the MAC addresses on specific ports, which then allows me to add a custom field in LS v5 to enter switch port number and patch panel number. Which puts my Access Database I've built for tracking that info to shame, by having that data linked to inventory already in LS.
When searching in the Search... toolbar, I can find PC's by entering the MAC address, 00:00...:01, but it doesn't grab the MAC address of already detected printers. Now that I've discovered that "bug", when I have a missing MAC address that's on the Cisco query, I go to my printer list in LS and resolve (find) the MAC addresses manually.
Feature request is to make the MacAddress field (Network interfaces) for printers, and other devices that have that field scanned, searchable like the PC's