JSIMPSON032607_01.jpgJessica Simpson JSIMPSON032607_02.jpgThey haven't been together that long, but it seems like Jessica and John may have already surpassed the "honeymoon" phase and are now settling in to the "boring old couple" phase. I guess the question is: are they headed for the "boring old married couple" phase? The couple were uncharacteristically solemn when they stopped by Pace in Laurel Canyon for dinner last night.