More specifically, was the pony creator taken down? I'm pretty sure it was under the "Media" section, but now it's not listed on the main page.
Sorry if this sounds stupid :P
Yes, you're right, they hid the media, probably because OAR (Open Access Release) is coming soon and you will be able to make your ponies there. For a right answer, let's better wait for a team member to answer.
The plugins required to make the pony maker work were discontinued.