As a teenager I was very active on technology discussion forums, and became the in-house developer for several. Modifying themes for Invision Power Board (now IP.Board), and tweaks to any external web sites or front pages were my general jobs, although I did make a few skins from scratch way back when.
The largest project I ever undertook was for a large community of over 30,000 members – the site had previously had a web site front end linked to their forum, but lost it during some upgrades. I created a new portal for them which linked in to their forums and displayed the top news posts, as well as most recent posts across the whole board, popular downloads, and a custom poll widget. I also created an extensive admin panel allowing admins to control exactly which forums the top/most recent posts were drawn from and set the poll.