I’m a big fan or reddit and one of our community (thanks frederiik) created a subreddit for Crashtastic! Not much there yet, but you can take a look here:
The goal of the sub-reddit is to share Crashtastic news, videos, images, and anything else related to the game. So if you have funny replays, designs, posts away!
Also don’t forget I use http://crashtastic.userecho.com should still be used to post bugs, feature improvements, and level ideas!