The core rule book for Tails of Equestria has migrated over to Barnes and Noble's website with a March 15th release date. They don't have any of the other accessories expected with the release, but for now, you can at least secure the core rulebook for your future play sessions.
Find the page for it over here. Expect it on March 15th according to their listing, following the UK version.
Thanks to joshua for the heads up!
