Can anyone help me out regarding sugar gliders?

I've been researching getting a sugar glider as a pet but still have some questions - what better place to come for some answers? To anyone out there with one of these little guys: where did you get them from? I am in New York state (they are legal here), but am having trouble finding anyone in the area selling them. Did you order them online? Hit up a shelter? Find one under your pillow one day? Also, my only real "major" concern is with cleaning up after them - do they become predictable when needing to go to the bathroom, as it were? Can they be litter trained?

What do you love the most about them? What do you wish you knew beforehand?

Thanks!