Keeping MAL up to date with some of the latest anime announcements we now have...
Jigouku Shoujo Season 3
A third series of the Hell Girl supernatural horror anime has been greenlit for production in Japan. The anime's main story revolves around a "Hell Girl" that a person can summon, via a website, to condemn another human to Hell. However the price for the service is the summoner's own soul — condemned to Hell as well.
Blade of the Immortal
The ever popular seinen manga Blade of the Immortal. No ANN article on this but according to Asuki's New Annouced Anime thread
it has been confirmed on Moon Phase
Telepathy Shoujo Ran
The Japanese public television network NHK-Educational will be airing an anime adaptation of the Telepathy Shōjo Ran Jiken Note (The Case Notes of the Telepathy Girl Ran) children's novel series by Atsuko Asano (The Comedy Team) in the spring of 2008. The novels combine coming-of-age stories with supernatural mysteries and center around Ran, a spirited middle-school girl who happens to have extra-sensory perception. She discovers this ability when she meets a transfer student named Midori, a girl who has the same power. Before long, the two girls join Rui (Ran's childhood friend and potential boyfriend who also has a power) and start investigating mystery cases with their abilities.
Himitsu -Top Secret
Hakusensha's Melody manga magazine has announced that Reiko Shimizu's Himitsu - Top Secret philosophical science fiction suspense manga will be animated for a Spring 2008 television broadcast. Even though Shimizu has been publishing manga for over 25 years and have created such acclaimed works as Moon Child and Kaguya Hime, Himitsu - Top Secret will be the first manga of hers to be animated. Since Melody is a bimonthly magazine, Shimizu has only compiled three volumes of this manga so far since she started in 1999.