Looking for an online story site that gets posted here...community written/never-ending story site...

It has it's own logo which is something like a pyramid with three arrows inside it.

The website hosts a Chapter by Chapter, user/community input story-book that can be added to by anyone.

What I've seen most there are fairly wildly detailed stories about time-traveling agents working for huge corporations that deal with different worlds and timeline control for various parallel Universes of Earth.

Anyone remember the website or know of any similar sounding websites where people upload their own input to create a series of semi-connected short-stories which can be read by anyone?