So a buddy of mine showed me this site last night with an article completely unrelated to what i'm about to post. But in any case... I have located the pages for Earthbound Zero/Mother 1, Earthbound, and Mother 3, respectively. Although most of the stuff on the pages is of stuff we already know about, there's some interesting trivia to be had I think. The way information is presented is really funny too! The only drawback I can find is that they use some slang that i'm not immediately familiar with (possibly because I only just discovered the site).

http://tvtropes.org/pmwiki/pmwiki.php/M ... hboundZero - Earthbound Zero/Mother 1

http://tvtropes.org/pmwiki/pmwiki.php/M ... lel20vmqnd - Earthbound

http://tvtropes.org/pmwiki/pmwiki.php/Main/MOTHER3 - Mother 3

(As a sidenote, the picture they have on the Earthbound page is amazing!!)

Edit: I nearly forgot to mention that those pages do contain spoilers. They are shown as being covered in white with a little border around it. To view a spoiler (Provided you've played through the whole game), highlight the text in question to view it.