I’ve heard you can install it via apt-get but I couldn’t find any decent details on how to do so. After some googling I found this site which has a link to a shell script that you simply execute and follow the instructions.
However, I had a small problem that was easily fixed.
It seems as though one of the packages that the script tries to install via apt-get is not around anymore; libmime-base64-perl. The only way I managed to get the script working was to manually remove this package from the list on line 30.
Here’s a direct link to the script for convenience.
Update
The script I’m linking to has now been updated so that it doesn’t include libmime-base64-perl. So there should be no problems following the install instructions as given.