Another Heaven
Cheryl is another doujinshi collector whose books I covet. She has informative reviews and summaries of her books. Her collection spans a lot of series, including Naruto, Gundam Seed, and Gensosuikoden. She also has a doujinshi store where she sells some of the titles listed on her site.

Miffy's Doujinshi
I owe a lot to Miffylube's site as it inspired me to make my own 'doujin catalog' page. She has a truly enviable Naruto doujinshi collection, most of it drawn by professional artists like Yun Kouga (manga-ka of Loveless) and Chrono Nanae (manga-ka of Peacemaker).

Nyanko no Doujinshi
Incredible & thorough Howl's Moving Castle doujinshi review site. Recommended reading if you're both a Howl and a doujinshi fan.


Panikku
Estefania has a neat collection of One Piece, Naruto and Hagaren het doujinshi -- and her site presentation of her books is absolutely excellent. Unlike me, she actually reviews the books so that other people interested in these titles actually know what they're getting.

Tokyojupiter.org Doujin
No, you're not confused. This isn't my site, but my friend Tania's. I have the .com, she has the .org. Unlike me, her site actually HAS a pretty layout and reviews.