I've been using Ubuntu since Warty and have been contributing since shortly after that.
- Created Alacarte for Ubuntu and eventually got it included in GNOME as of 2.16
- #ubuntu op for ~18 months and member of ubuntu-ops team
- Been on the forums since Mar 2005 and have made over 1000 posts, most of them helping people in the "Ubuntu Development" subforums
- Created WillowNG for Edubuntu during the 2006 Google Summer of Code
- compiz development, bug triage, and end-user help
- Basically my plans for future contribution to Ubuntu are just doing what I'm already doing.