Yaoi Otaku – There isn't a huge amount of yaoi manga, but from what you do get access to the smut's pretty good. The site's design is simple but superb, and they allow you to download the content which you enjoy reading. I looked through some of it, and while gay comic porn isn't my thing, I'm sure you'll do a lot of downloads.
In addition yaoi manga, there are yaoi-themed novels, movies, anime which you can download or buy as well.
