I have been developing projects based on the Everything Engine for some time now, both for my company and for myself I have always found it to be a sufficiently abstract environment in which to create online community spaces, multiuser web applications, managed, dynamic content systems, etc. etc. In many ways, it's the Perlish answer to Zope.

That said, it is a rather strange system to wrap your head around if you're not used to its style. First time setup and configuration is known to be a tad bewildering and you can expect to spend a good deal of time customizing its inner workings (and outer appearances) to suit your purpose.

Whether or not it's "right for you," depends on the scope and purpose of your project. If all you need is a pure, unadulterated wiki--and no more--you might have an easier time setting up an established system that's dedicated to that task.

There's a lot of renewed energy going into the Everything Engine right now, though, so it's probably a good time to hop on board. The code is easy to extend, well documented, and is supported by an increasingly active community.