According to the newest issue of TECH GIAN magazine, the adult PC game Tayutama -kiss on my deity- has been announced to get a TV anime adaptation. It will be aired in the spring of 2009.

Synopsis:
Mito Yuuri is a high school boy living in Hachiei shrine, which is dedicated to a god named "TayuTayu-sama". One day, a strange ruin is found at the construction site of the playground of his high school. Yuuri accidentally summons the god and releases the sealed spirit "Tayutai". Next day, a girl called Mashiro appears and announces to him and his classmates "Now is the time to realize the 500 year long dream. Let's bring a world where humans and Taytai can live together, my darling!"

Source: MOONPHASE
Official website
a key illustration of the game

Edited on Dec 25th=================
According to Megami magazine, the staff and cast are as follows:

Staff
Director: Motonaga Keitarou ("School Days", "Akane-iro ni Somaru Saka")
Series organizer: Uezu Makoto ("School Days", "Akane-iro ni Somaru Saka")
Character designer: Ohkawara Haruo ("Kakyuusei 2")
Graphic art director: Ohkawara Haruo, Noguchi Megumi (episode art chief of "ef - a tale of melodies")
Production company: SILVER LINK. ("Neo Angelique Abyss" (subcontractor))

Cast
Izumito Mashiro: Rikimaru, Noriko
Kawai Ameri: Shimoda, Asami
Takanashi Yumina: Mizuhashi, Kaori
Kisaragi Mifuyu: Itou, Shizuka

Source: scan of Megami magazine