I have got this so far:
Yeti-Alpha testers
Senor Fun Pickle-Beta testers
GNG-Beta Pickle (received randomly after playing with it for a while)
Dusty Stick-2012 Housing Bug (lost items)
P. Dolls- Rubes
Plate of beans- A group of Metafiler made a joke, and Eric Costello (dev) created it for them
Musicblock SB1- From devs
Musicblock T1- Unknown
Recently Added: Star: Staff Only
So the 2 music blocks are my concerns.