There are not many Othello sites out there, here are some pages you might find interesting!
Japanese sites:
English sites:
Satomi Ikezawa's Official Site - with some iformation, a diary, great pictures and much more!
Betsufure Online - The official site of Betsufure, the magazine where Othello runs in.
Satomi Ikezawa's comic list - A list of all her works ^_^
English Kodansha Site - All Manga and Manga Magazines that are published by Kodansha!
Othello @ Random Shoujo Manga Page - A short Othello Review by Emily.