require CC3000 return blank function

require("CC3000") itself returning a blank function is expected. When you run the code from http://www.espruino.com/CC3000 nothing gets printed until the result is received... Try:

console.log("Initialising CC3000");
var wlan = require("CC3000").connect();
console.log("Connecting...");
wlan.connect( "AccessPointName", "WPA2key", function (s) { 
  console.log(s);
  if (s=="dhcp") {
    require("http").get("http://www.pur3.co.uk/hello.txt", function(res) {
      res.on('data', function(data) {
        console.log(">" + data);
      });
    });
  }
});
console.log("Done.");

And see what happens. It's possible that your Access Point's name or key isn't being recognized.