Howdy! My name is Jeff Mercer and I created a project called DeepMac for databasing information on MAC addresses and their associated OUI's.
The search engine for this can be found at http://deepmac.jedimercer.com/ I stumbled across this mailing list while searching on various OUIs trying to identify video game systems. So I was of course pretty happy to find some archived postings about that very topic! :) I don't use Cisco NAC, but would welcome any feedback on the DeepMac project, and any useful intelligence I can add to it. It's a looooooooong way aways from something like NAC Profiler but the gist of it is similar.
