For when the show starts up in October...
Since tv.com has created and is maintaining the The Spice Shop Grimm community board, pretty much all episode discussion has moved there.
I'd encourage folks to check it out, post reviews, quotes, video, polls, images, and so on there.
Beyond what is already prohibited here, feel to use the forum for whatever discussion you like. But the majority of traffic these days on current shows is going to the communities.