For your consideration: The Warehouse, a panfandom game set in the Warehouse 13/Eureka universe. We're new and fairly slow-paced, so far; there's an overarching meta plot that you can join or not, and opt-in Artifact plots (we should be hitting the first of those this coming month). AC's easy (one thread, 10 comments), and we're totally backtag-friendly.

We have a test drive up if it strikes your fancy! (And maybe you'll even tempt Diana out of one of the current players... if we can figure out how to give Gabe a physical form there. XD)