title: Geocoder ruby gem on demand?
body: <p>I have a large database with 4+ million addresses/records.
  The rake command (below) worked fine when the database was a small test set, but now with the large database it just simply stalls.</p>
  
  <pre><code>rake geocode:all CLASS=YourModel
  </code></pre>
  
  <p>2 questions:
  1. Is there any simple method to have geocoder code a null/nil lat and long when the records are called (on the fly). I have a feeling that this would be hard.
  2. Anyone else have problems with geocode-ing a large dataset and using the rake command?</p>
  
  <p>Thanks!</p>