Completely forgot about creating Umineko manga thread when it has been released. Created in manga section, most likely will be moved over to its own sub-forum once anime is aired.
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Wikipedia
Umineko no Naku Koro ni on wikipedia
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As of June 21, 2008:
Umineko no Naku Koro ni - Ep. 1 Legend of the Golden Witch
Umineko no Naku Koro ni - Ep. 2 Turn of the Golden Witch