According to Dengeki news, SEGA's PlayStation 3 RPG game "Senjyou no Valkyria" will be animated. The production company is A-1 Pictures ("Kannagi", "Ookiku Furikabutte"). It will be aired from the spring 2009.

"Senjyou no Valkyria" is a simulation RPG game and was released on April 24, 2008 exclusively for PlayStation 3. The English title is "Valkyria Chronicles".

Source: Dengeki news
Source: Senjyou no Valkyria Anime Official Website
Source: Sejyou no Valkyria Game Japanese Official Website
Source: Valkyria Chronicles Official US Website

Edited on Dec 6th=================
According to New Type magazine, the production staff are as follows:
Director: Yamamoto Yasutaka (episode director of "Ookiku Furikabutte", "xxxHOLiC - Kei")
Series organizer: Yokote Michiko ("Nabari no Ou")
Character designer: Watanabe Atsuko (ED animator of "Vampire Knight Guilty", episode art director of "Onegai My Melody Sukkiri♪")
Production company: A-1 Pictures Inc.

Source: Scan of NewType magazine