The WildStar Forums announce realm transfers to improve the "health" of PvP servers in Carbine's MMORPG since their "megaserver" deployment (thanks Massively). Here's word:

As of 10/28/14, once NA servers come back online, we will enable free PvP to PvE and PvE to PvP realm transfers. You will be able to transfer from PvP to PvE servers and vice-versa, for free, for your games account region. Normal realm transfer rules will still apply, for more information on server transfer restrictions please see this Support article.

For the time being, these transfers will remain open indefinitely, but we will be closely monitoring the situation and if we feel it necessary we will remove this service. Rest assured, we will ensure to give you appropriate notice if we do decide to shut these free transfers down, as well as an explanation as to why.

We expect there will be some concerns about players using PvE servers to level up, without the dangers of a PvP server, and then transferring across once they reach max level, however we felt that ensuring the health and community of each server is more vital. We will be keeping a close eye on things for any shenanigans or foul play though.