The site I mentioned in the post above is now working.
The one volume ero manga
Aneki... My Sweet Elder Sister (あねき・・・ My Sweet Elder Sister) by Yoshu Ohepe will be animated.
Cover and few pages of the manga can be seen here: (NSFW)
Aneki... My Sweet Elder Sister manga was serialized in the adult men's manga magazine
Comic Mujin (NSFW).
This is an ero-anime adaptation of the manga :P
First OVA will be released on 28/9/2007 and will be titled:
あねき・・・ MY SWEET ELDER SISTER THE ANIMATION senior.1
Aneki... MY SWEET ELDER SISTER THE ANIMATION senior.1