Eric Vale is going to be at my local con, AFW, in July, so if there's no new info on season 4 by then I'll see if I can get some kind of cleverly phrased comment from him that gives hope or something.
On a somewhat unrelated note, Eric Vale's bio on the AFW site is pretty much amazing.
Eric Vale is going to take over the world!
Actually, he’s just an actor who has spent a lot of time under lock and key in sound booths voicing anime characters such as Trunks in Dragon Ball Z, Sanji in One Piece, Yuki in Fruits Basket, and Kymblee in Fullmetal Alchemist among many others. Eric has also spent time as an ADR director in addition to scripting over fifty anime programs as Head Writer with FUNimation Productions. Outside of the world of anime, Eric has written, produced, and directed three short films, all of which are currently making the rounds on the international circuit. His short story The Beautiful Middle of Nowhere was recently published in Slice Magazine, and he is currently expanding it into a novel.
As you can see, one should not trifle with Eric Vale.
On the weekends, he builds bridges to the future, crafts a superconducting collider in his backyard, and moves mountains with his freaking bare hands.