The official contact email is now [email protected]
(The default alert sound is annoying, but I changed it to /System/Library/Sounds/Pop.aiff in Options -> Notifications -> Sound.)
JungleCat has also done some impressive gamedev work. Check out his "scent map" pathfinding technique in the browser: https://www.laarc.io/item?id=274#285 Haven't seen anything like it.
It's probably time to add a "Show" section.