I2C2 now working on pico?

Ok, try:

I2C1.setup({scl:B6,sda:B7});
var bmp;
var g = require("SSD1306").connect(I2C1, function() {
  bmp = require("BMP085").connect(I2C1);   
  setInterval(function(){
     bmp.getPressure(function(d) {
     //console.log("Pressure: " + d.pressure + " Pa");
     console.log("Temperature: " + d.temperature + " C");
     g.clear();
     g.drawString("Temperature: " + d.temperature + " C",2,2);
     // write to the screen
     g.flip(); 
   });
  },1000);
});

So initialising the display, and then initialising everything else in its callback. If that doesn't work it could be the BMP085 is messing things up somehow when it's not initialised, so you could try doing it first:

I2C1.setup({scl:B6,sda:B7});
var g;
var bmp = require("BMP085").connect(I2C1);   
setTimeout(function() {
  g = require("SSD1306").connect(I2C1, function() {  
    setInterval(function(){
      bmp.getPressure(function(d) {
        //console.log("Pressure: " + d.pressure + " Pa");
        console.log("Temperature: " + d.temperature + " C");
        g.clear();
        g.drawString("Temperature: " + d.temperature + " C",2,2);
        // write to the screen
        g.flip(); 
      });
    },1000);
  });
}, 1000 /* 1 sec after BMP085 init */);

Re-initialising the display each time really isn't a solution (it'll flicker massively every time you update it).