I've read RING, SPIRAL, LOOP and BIRTHDAY by Suzuki Koji, I also read his newest book DARK WATER.
I read Dark Water in English and the others in Japanese...Ring and Spiral have been released in English however Loop and Birthday aren't out until later this year.

And I also have been reading Kodomo no Omocha (Child's Toy) in japanese. I think it was licensed by Tokyopop so it should be coming out already or it will be soon.
Oh I re-read Tenshi Kinryoku (Angel Sanctuary) again.

Oh I forgot one thing, I've 'read' a bunch of manga/dounjinshi lately because I translate it. I won't post the link for fear of spamming you all but if you'd like it just let me know.
However these don't exactly count because I'm concentrating more on translating then just reading and enjoying. :3