There is just one mailing list for the Linux Driver Project:
The developer mailing list is where the new projects are announced and asked for volunteers from, discussions about the project either technical or procedural, and is the general location for anyone wishing to help out with the Linux Driver Project.
The list is open to non-members, but HTML is not allowed on the list to cut down on spam. Anyone is allowed to join the list if you wish to help out or ask questions.
More information on how to join the list, and to see the archives of it, can be found at: http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel