This is a guide for those that want to install the new Google Chrome Beta, and be able to update it through apt.
First add the google repo to the end of your /etc/apt/sources.list file as root.
Now add the package signing key by running:
# Google software repository
deb http://dl.google.com/linux/deb/ stable non-free main
sudo wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
Now to actually install the Google Chrome Beta run
sudo apt-get update
And that's it! Now you can run Google Chrome from you Application>Internet menu or by running google-chrome in the terminal.
sudo apt-get install google-chrome-beta