At their Anime Expo 2009 booth, MangaGamer was passing out flyers about 07th Expansion’s Higurashi no Nakukoro ni. According to the flyer, there are plans for MangaGamer to release a localized version of the original doujin release this fall. They also have a laptop running a promotional video about Higurashi.
UPDATE: At their Anime Expo panel, MangaGamer suggested they might release the game in two arcs of four chapters each, much like the original.
UPDATE2: An update on their website indicates a release before the end of October