I apologise for this post in advance, as I'm sure it must have been answered elsewhere - it's just I can't find it anywhere.

I'm currently in the middle of redesigning the following site, and changing from Movable Type to Drupal:

http://www.ganymede-titan.info/

Now, obviously whether something is a News item or a Site Update can be flagged using a flat vocabulary. But how do I get a theme to make the front page of a Drupal site display the News items in one column, and the Site Updates in the other?