Digiorno mentioned playing on bass in a Catbarn named band (there was that interview topic where the three actor NPCs were talking to each other). And Keanu was indeed a bass player in a band called Dogstar. (Dogstar, Catbarn --& dog, cat...)
Also his avi has a sandwich in the hand that could be a reference to that "famous" Sad Keanu internet meme (a paparazzo took photos of him while eating sandwich on a bench, he looked tired/sad on them and people kept manipulating that photo in many ways on the internet).
Also, the clickable Digiorno head shows resemblance with these pictures a bit (on the photo, the hair and the brows seem to be similiar", on the A Scanner Darkly shot the face itself minus the glasses):
I'm not forcing my theory, but I think there are more than one signs to notice, at least the ones I mentioned before the pictures
smile