The Japan Literature Home Page is a good resource for those interested in Japanese literature. Their blurb on Miura Ayako can be found by clicking here.
Word of Life Press has a Music Catalog that includes a description of the movie Kairei (Hidden Ranges) based on Miura's novel of that name.
Wikipedia has an entry on Ayako Miura (contributed by me, actually), but one of the cool things about it is that there are links to the Miura entries on the Korean and Chinese versions of Wikipedia on the left side of the page (under "languages")
Most sites that mention Miura Ayako have "borrowed" from my World of Miura homepage, or from the Wikipedia article. But if I find any more sites with original content, I'll keep adding them here.