This new Facebook group, organized by fellow researcher Siga Pliodzinskas, aims to connect researchers interested in the Lutheran church records in Lithuania--mainly those located in the former Neuostpreußen (New East Prussia) where the majority of German/Prussian-Lutherans settled. The group is called Lietuvos Liuteronų Genealogija (Lithuanian Lutheran Genealogy.)
You can join the group here:
I can tell you from experience that Facebook groups like this can prove to be invaluable, as many times, you are able to collaborate with people all over the world. But more importantly, you can speak with people living in (or nearby) the areas you're interested in. So if you're doing research in this part of the world and need help, join this group!