In a PDF released by Sotsu that contains information of animes releasing in the 2nd half of 2009, Umineko No Naku Koro Ni was mentioned in the article for a possible July release this year.

Umineko No Naku Koro Ni (うみねこのなく頃に) orginates as a visual novel that depicts a story of murder and mystery by 07th Expansion. The story tells a tale which took place in the year 1986, during the time frame of October 4 and October 5 on a small, secluded island named Rokkenjima (六軒島) owned and lived on by Kinzo, the head of the wealthy Ushiromiya family. Kinzo is near death, and eight of his family members arrive on the island for the annual family conference. Also on the island are three family members who live there, five of Kinzo’s servants, and his personal physician. After the eight family members arrive, a typhoon traps them on the island, and shortly after, strange things start to happen and people start dying.

Source: Moonphase