Pseudo-random Token generator .. dont have to worry about uniques. Coded for nodejs ... outputs to console the generated tokens.. can be used as IDs in any application

000-lessthan140chars.js

function(){var a=1E15;return function(){var b=~~(1E3*Math.random());a>9E15-b&&(a=1E15);a+=b;return a.toString(36)}}();

TokenGenerator.js

// This produces (9e15-1e15)/1e3 tokens in worst case, 
// i.e. 8e12 or 8000 billions.... thats got to be more than enough
var randomGenerator = (function(){
  var MAX = 9e15;
  var MIN = 1e15;
  var safegap = 1000;
  var counter = MIN;

  return function(){
    var increment = Math.floor(safegap*Math.random());
    if(counter > (MAX - increment)) counter = MIN;
    counter += increment;
    return counter.toString(36);
  };
})();