editors.dmoz.org currently resolves to 188.8.131.52, but when you do a reverse lookup on 184.108.40.206 you get editors.dmoz.aol.com. From this alone I'd assume the ODP hardware is very much part of AOL.
Would you let volunteers have sysadmin permissions on a server within in your corporation? Would you even let a volunteer inside your datacenter?
Could you give us a definition of true "public service or charitable work", please? :-)
For reference, [dmoz.org...] has PR8. I'd PAY to host dmoz.org if I could include one link on the homepage.
My guess is "both". There's certainly volunteers testing the new setup, wouldn't be surprised if they're helping debug stuff. Quite a few talented people higher up on the volunteer side of things.