I love this question too and can't wait to read the answers ...
For me it is how I picture it in my story.
After spending a while apart, they are living together, -they keep Kinnetik, Babylon and Britin, they also own the floor below the Tremont loft and a Loft in NY. -Brian and Justin are commited, no one know, they have rings, the one from the comitment. -They are working on Monogamy, and they are fucking rag. -Mel and Lindsay are in Canada, until they broke up. -Mel come back to Pittsburg with JR, she's dealing with cancer. -Lindsay moved to France with Gus, who's sending back to Pittsburgh a while after. -Gus is living mostly with Brian. -Justin and Brian have a long distance relationship. -Drew come back, he's finaly 21 and will stay with Emmmett. -Blake and Ted together forever. -I keep Ben and Micheal together, but Ben take often Brian's side. -Daphne's staying with Brian because her building had been sold ... . -Justin had a few shows and get some notoriety, he's also working for kinnetik. -Daphne will get married, and she made a promise to Justin to give him a baby.