I'm maintaining our servers va and master. I'm maintaining the mailing lists on our listserver. Together with some other people I'm processing new-maintainer submissions and make sure that they know what debian is all about before they start joining. I'm listening to some well-known security lists and advise maintainers to fix their packages if we're affected. I maintain the virtual mail server packages.debian.org.
Many maintainers meet there regularily.
I'm also maintaining the list of frequent users. I'm somewhat familiar with some journalistic techniques and therefore normally actively working on PR stuff like press releases. I'm also an author of several Linux and Debian related articles that were published in various german computer magazines. I also maintain some packages that I don't put into the Debian Linux queue. This has several reasons.