Fill vertical space in a beamerposter poster [duplicate]

Question

Possible Duplicate:
Why does vfill not work inside a beamer column?

I'm trying to tweak beamerposter examples to my needs. The one example I found fairly simply as a starting point on the one hand and full enough on the other can be found at Shawn Lankton Online.

However, I fill to achieve one thing, namely fill vertical space, when the boxes are "too" small. For instance, in the example poster, given in the zip file, the boxes are rather small, and concentrated at the center of the page. How can they be spread vertical and evenly over the page?

I tried using \vfill but it didn't work... Any ideas?

\documentclass[serif,mathserif,final]{beamer}
\usepackage[orientation=landscape,size=custom,width=70,height=40,scale=.6,debug]{beamerposter}

\begin{frame}{}
  \begin{columns}[t]

    \begin{column}{0.32\linewidth}
      \begin{block}{Summary}
        Block 1
      \end{block}
\vfill
      \begin{block}{Motivation}
        Block 2
      \end{block}
\vfill
      \begin{block}{Columns}
        Block 3
      \end{block}
    \end{column}
  \end{columns}
\end{frame}
\end{document}

Answer 1

There are several methods to accomplish this.

One of the easiest solutions is add a rubber length. This is done by inlcuding the code

\hspace*{ 5cm } for example. This adds 5cm vertical space.

Another way to accomplish this is by using the package 'varwidth'

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