Like other sites on the 'Net, this site is link free. But please do let me know if you're linking this page. I'm paranoid. And y'know. I could reciprocate the link, eh?

Aestheticism.com
Probably the most-linked yaoi site on the web, this place has translations, reviews, articles, online store, and more. A very good site for looking up more manga to follow.

Common as the Rain
Fiction, manga reviews (with images), bookc recs, and a small sales page.

Palefire.org
Domain with a website that features selected comics and provides Kizuna translations. Or rather, it did. Seems to be down right now.

MangaBonbons.net
Biggest site I've seen for yaoi manga. It has cover-scans of what looks like nearly every yaoi manga published. Some of the titles have reviews, and some do not. A good place for looking up books by specific authors.

Random Yaoi Manga
Name says it all. Yaoi manga summaries and reviews. Comes with cover-scans and sample pages.

Slash-kun's Japanese Yaoi Manga Page
Reviews/Summarizes manga. These reviews can often be seen at MangaBonbons, but it's good to check this place for the newer reviews. It's -very- hard to read, since English isn't the webmaster's primary language and the format is packed, but very good for getting fairly recent information.

The Yaoi Shrine
Famed page of yaoi scans and fiction. Very good for seeing what the art looks like before you commit yourself to a purchase.