The Discussions online forum community is now the property of Red Staff Apps and can be found at the following location: http://discussions.redstaffapps.com. Please update your bookmarks accordingly.
If you are on mobile, the best way to experience Discussions is by using Forum Fiend, the free mobile forum reader app from Ape Apps, that comes pre-configured with Discussions! Get it now on Android and Windows Phone.
If you are looking for the My Planet support page, it has been moved to Google Plus Communities and can be found here: https://plus.google.com/communities/113390769020765062372
The regular Ape Apps support forums have also been replaced with Google Plus Communities. Find the Ape Apps Support community here: https://plus.google.com/communities/102441474199411038872