I'm moving GameDev Challenges to the new Groups feature, which I'm rolling out as a beta as I work out the kinks figure out how best to integrate it with the community. (so many ideas!)
I've already created a GameDev Challenges Group. You can also access groups through the Browse -> Groups menu item.
Join the group and check out the group announcement! I'll be posting the next challenge there within the week.
Thanks for making the GameDev Challenges a fun and successful part of the community. Let's make it even better with the new Groups feature. 
