I am so sorry to hear this tragic news. If I may, I have a few NYCPUL memories to share:
I was so glad when Amir created NYCPUL several years ago. It was a pleasure to have an organized ultimate league here in the city, since like most people I was used to playing pickup in the dustbowl in Central Park atop rocks and glass and whatnot.
Amir put a great deal of effort into getting the playing field and organizing the league, both tough tasks in NYC. I know many people (myself included), really enjoyed playing organized ultimate for the first time in a long time. I still have my t-shirt from the first season and will think of Amir whenever I wear it on the field.
Daniel M. Bernstein