What is it about Burmese food and long waits? Burma Superstar in the Inner Richmond is legendary for the starving throngs that gather like cicadas at the entrance, killing over an hour in the hope of obtaining a table. Yamo isn't nearly as popular, but it's a fifth the size, consisting of just one long counter facing onto a small, open kitchen at which a trio of stone-faced and silent women sauté, chop and boil various food stuffs with an efficiency which belies their ponder