There are very few links you need to find anything about Kimagure Orange Road. The number one link is:
This link will take you to the greatest KOR page in Cyberspace, which includes links to about 1000 other KOR sites.
Another couple of links you need are to translations of the novels. There are currently three novels set in the grown-up world of Kimagure Orange road, and so far I've found two good translations on line. The links are:
Shin Kor II: The Pyramid Murder Mystery
You will also need to know where to get the Manga. I recommend Kinokuniya Books in San Francisco, who will order any volume (or the entire set) for you if they don't have it in stock
Also, you need links to two anime distributors here in the U.S. They are AnimEigo and AD Vision. AnimEigo has the rights to the Television series, all of the OAVs and the first movie, while AD Vision has the rights to Shin Kor.
One last link. ComicOn. Ths is the website for electronic publications of Matsumoto Izumi and others, plus some other fun stuff. The English version of the site doesn't always work, so be warned.