Wondering--does anyone know of any good articles explaining the CSS technique allowing multiple instances of a class to flow down the page relative to the items above it. Not explaining it that well.

Veerle' Pierter's does it on this page: http://veerle.duoh.com/belgiangraphicdesign Although I'm not sure I want to use a technique like her's that requires entering of the height per element via her EE installation.

I made a little graphic of what I am trying to acheive; http://cl.ly/71163510ce9d294f9f33 The key is I need a robust technique for doing it. Something where the markup could be as simple as;

<div class="box">
  Number 1
</div>
<div class="box">
  Number 2
</div>
<div class="box">
  Number 3
</div>
<div class="box">
  Number 4
</div>
<div class="box">
  Number 5
</div>
...

Would love any pointers in the right direction.