I think the best resources for new KH info would be Japanese sites. I go to this site called 'FF7AC Reunion' a lot and they normally get news up very quick. You don't necessarily have to be able to read a lot (or any at all) to find KH news. They normally use the initals for which KH game it is in the header and you can interfere some things.
Japanese blogs get stuff up first, like Light in Chaos. Gamekyo is also really good about getting stuff up quick. I think that's it, though... For things like the official sites updating, just watch the Japanese Square Enix homepage. You have to know some katakana (at least the letters to spell Kingdom Hearts in Japanese 8D
to know if KH stuff is being posting up, though.
You can also watch sites like GameFAQs' KH boards, IGN's KH pages, and maybe Kotaku. That's about it, though. ^^;
Hope that helps and, if you apply, good luck!