I have a 512MB Pi.  I am trying to make sure I am getting the most of it.  I just downloaded a fresh [2012-12-16-wheezy-raspbian][1] and installed it on the Pi.  Do I also need [rpi-update][2].  Is  rpi-update meant for upgrading from the one version of Rasbian to the next?


  [1]: http://www.raspberrypi.org/downloads
  [2]: https://github.com/Hexxeh/rpi-update