Well here's some sad news (for me at least). In an interview, Shigesato Itoi, the main creator of the Mother series (Earthbound in the US) said that he would not be making any more Mother games. It was in an interview with a young Japanese writer. Here's the relevant part-
A portion of a 1101 interview that involves Mr. Itoi and Mr. Shiraiwa...
Itoi: ...games demand many more lines of dialogue despite the fact that the main characters don’t talk, so I couldn’t keep making them. That’s why I felt deep down after making three of them (Earthbound titles), “Well, that was a neat experience.”
Shiraiwa: So you’re done with them?
Itoi: Yes, that’s right.
It's sad to know this. Maybe he'll change his mind someday. But for now, there's not much of a bright future for the series, unless they finally decide to release it outside Japan, or remake the games later on.
http://gonintendo.com/viewstory.php?id=105237
http://earthboundcentral.com/2009/11/still...e-mother-games/