The Code of No-Code

Before upgrading you'll want to:

sudo rm -rf /opt/sublime

Next...

tar xf Sublime\ Text\ 2.0.1\ x64.tar.bz2
sudo mv Sublime\ Text\ 2 /opt/sublime

For an install you'll also need:

sudo ln -s /opt/sublime/sublime_text /usr/bin/subl
sudo subl /usr/share/applications/sublime.desktop

into which you'll paste:

[Desktop Entry]
Version=1.0
Name=Sublime Text
GenericName=Text Editor

Exec=subl
Terminal=false
Icon=/opt/sublime/Icon/48x48/sublime_text.png
Type=Application
Categories=TextEditor;IDE;Development
X-Ayatana-Desktop-Shortcuts=NewWindow

Optionally you can make Sublime your defulat editor by opening /usr/share/applications/defaults.list and replacing all instances of gedit.desktop with sublime.desktop.