For what it is worth, I am not a fan of flowers...expensive and there is nothing to show for them after a few days. Perhaps something a bit more permanent like a plaque of some sort or a framed collage of pics from 'Aussie Pinball' that can be given to his family in lieu of flowers? Gav- even some sort of neon sign maybe that would be a unique tribute to Greg?
Greg's family may even have a request of where any money raised should go to?
The permanent tribute page to Greg is an excellent idea.