It was confirmed that ufotable, the studio that already adapted Type-Moons other works, the Kara no Kyoukai novels into movies and the Fate/Zero novel into an anime, will also take up a project of animating the Fate/Stay Night visual novel.
This would be the second Fate/Stay Night anime, after the first animated version which was done by studio DEEN as well as a movie done by the same studio.
Looking back at the previous works, this should be more enjoyable than anything DEEN has done with the series.
Original Twitter Post: https://twitter.com/hikaruufo/status/355709589787910145
More confirmations: http://yaraon.blog109.fc2.com/blog-entry-17363.html