Debian Maintainers are people who are not full developers but have a restricted ability to upload packages to the Debian archive.
the Debian Maintainers concept was introduced on 5th August 2007 by General Resolution.
A Debian Maintainer has their key in the debian-maintainers keyring (available in the debian-maintainers package).
This keyring is used by dak on the Debian archive as part of the checks as to whether an uploaded package is to be accepted.
Becoming a Debian Maintainer
http://www.debian.org/vote/2007/vote_003 - GR and details of procedure
http://packages.debian.org/debian-keyring - keyring package
http://bugs.debian.org/debian-keyring - pending keyring change requests
http://lists.debian.org/debian-newmaint - list which typically has the proclamation and advocacy mails posted to it
see ["?LicencingTerms"] for info about wiki content copyright.