This is quite shocking to find out.
RIP Addison and condolences to the Sengco Family.
GF was one of the first posters I met when I joined Newsarama and one of the reasons I joined the the 20+Somethings Group. He was always a constant on the board with his quirky posts and his vast knowledge of wrestling, anime, manga, indie comics (he never really followed any mainstream, though). Addy was always happy to see you, especially if you didn't post in a while.
Talented artist, always a friendly attitude are the things that first pop into my mind when I think of him.
I've always considered him one of my closest friends on the board and had always hoped to meet up with him when I eventually went back to the Philippines.
We'll miss you "Hiro" and thank you.