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).