The Ubuntu TeX team seeks to look after the various TeX packages in Ubuntu. This involves bug triage/fixing, package maintenance, and QA testing.
List of packages:
Launchpad Team: https://launchpad.net/~ubuntu-tex
How to Contribute
Launchpad Membership Policy
People of all skill levels are free to join, but please be serious about wanting to help. Members will be subscribed to TeX packages in Launchpad and will receive bugmail from them so they can keep updated on bug activity.