NOTE: This is NOT official material, and is an interpretation created entirely for James Fullerton's games. GM's are encouraged to create their own truth behind the many conspiracies created by SLA Industries over the centuries.
In JNFWoP White Earth once was Earth, but now it is a whole lot more (or less depending on your view-point). It is the influence of White Earth and the power of the White on Mort that gives all of the Earth references and religions - think of them as ghost signals that have floated through the universe for countless millennia.
Not FoldShip technology, but Ion Drive technology. Most of the conflict Wars in JNFWoP were system wars, battling it out amongst individual planets. As it looked like a winner of a particular system was going to win, Slayer introduced them to his FoldShips and allowed them to fight against the other systems. All along he was simply trying to get them more and more reliant on Sla Industries to the point where he could destroy them all. During this time some of the Ebons decided that they didn't want to work for SLA and so they left to join the different factions across the WoP, helping to spread the knowledge of reality Folding throughout the WoP.
In JNFWoP White Earth does not have a fixed location in space. Or rather it does, but it appears to always be nearer to each planet than it seems. In a similar way that we can see Mars on this planet, *every* planet can also see White Earth. When the Storms hit the planet it appeared to grow in size, shooting of bursts of radiation/energy in all directions. Similar to a solar storm in this galaxy, these bursts were said to cause both madness and enlightenment on the planets that they passed through. It would have been very hard for anyone not to have noticed the events.
In JNFWoP it was during the Conflict Wars that Intruder found the Ebons and taught them Ebb Mastery. At the time he was happy for them to roam the galaxy and find their own path in their life. These first Ebons tended to be more powerful and did not require DeathSuits for their abilities. However the power was too much for many, causing some to go insane and others to forever forgo the use of the Ebb. A growing group liked their abilities but saw how SLA wanted to use them and rebelled, siding with the Conflict Races that acted against SLA as well as the groups that would become Thresher and DarkNight. Those that remained sought Intruders help in focusing and restricting their powers to those who could handle them properly. It was for this purpose that the DeathSuits were created. JNFWoP also allows for other races that were in touch with the Ebb, but to a lesser degree than the Ebons. The majority of them were destroyed in the Conflict Wars and none have been heard of recently.