Weekly posts sound like a good idea, at least to get things moving. Maybe Monday would be better than Friday, though, because people could discuss the shows shortly after they aired, thus meaning the show would be fresh in everyone's minds -- and it would also give people the option of catching up with the shows & discussion on Friday, Saturday, and Sunday.

Of course, since not everyone is able to watch the shows when they first air, that brings up the issue of spoilers, and how people feel they should be handled.

ETA: It might be helpful to link to dw_codesharing either in an intro post or the profile, in case people who are currently LJ-based want to create an account to participate.