I only discovered this show in the third season (thank you, Karen Gillan!) and I'm currently enjoying the first two seasons on Adult Swim.
I can't find anything on the internet about it being cancelled, but nothing about new episodes either. And it's been almost a full year since the last new episode aired.
Meanwhile, Children's Hospital *was* renewed but it's not airing a single episode in 2014 and will return sometime in 2015.
http://www.hollywoodreporter.com/live-feed/childrens-hospital-renewed-sixth-season-700459
I can't find anything on the internet about it being cancelled, but nothing about new episodes either. And it's been almost a full year since the last new episode aired.
Meanwhile, Children's Hospital *was* renewed but it's not airing a single episode in 2014 and will return sometime in 2015.
http://www.hollywoodreporter.com/live-feed/childrens-hospital-renewed-sixth-season-700459