Where is Sublime Text 2 installed

I don't know the answer to this exact question, but to know wich files did a package install you can use this command:

dpkg -L <package name>

The best thing is that you can use tab completion with it so:

dpkg -L subli<tab>

is likely to give you the answer.

You can also use Synaptic to find this list through a GUI.

The command for starting it is most likely

sublime-text-2

though try

sublime-text

and

subl

These are the programs, or links that get installed to /usr/bin/ (if my limited understanding of deb packages is anything to go by, I don't actually use the software).