I have long been seeking in Boston a good Saturday morning diner breakfast. Ideally, this would be a slightly "enlightened" diner along the lines of the old American Diner in West Philly or Bright Foods in Chelsea. Somewhat beyond two scrambled eggs and toasted white bread but not too pretentious. Any ideas out there? Cambridge/Somerville area is best, but for the right stack of pancakes, I am willing to travel.