As most of you figured out this white creature is a white sugar glider (Petaurus breviceps).
It is a leucistic individual. Unlike albinos, leucistic animals still produce some pigment.
This white coloration would never serve it well in the wild. Something that white would attract virtually any owl that happened to pass through the area.
However, this white coloration does increase their value on the pet market. This is a captive individual.
Sugar gliders are the most commonly available marsupial on the pet market, even if they do make a lot of noise at night (including some pretty loud buzzer shrieks) and can give a pretty nasty bite.