InuYasha: The Final Act (link is to the Official Japanese site) will be an adaptation of the last 21 books of manga-ka Rumiko Takahashi’s InuYasha series. This has been a long await since the Takahashi finished the manga in June 2008.
There is already an increase of activity noticed in fanfiction sites such as the InuYasha sections of Fanfiction.net and AdultFanfiction, as well as InuYasha-Fanfiction.com, Dokuga, and Eternal Destiny.
Prominent InuYasha fan, and site owner of the InuYasha scanlation site called AdInuYasha.com, Urd-chan posted the updates all over her Deviantart account on September 5th, 2009 with her article New Inuyasha series to begin in Japan!, and a followup on September 30, 2009 with her article New IY anime to be simulcast by Viz. She also posted to the popular Yahoo! Group, adinuyasha.
You can preview the English subtitled version of InuYasha: The Final Act at Shonen Sunday.