First up, let's make Sublime Text 2 available from the command line in terminal, by creating a link to subl which is the launcher from terminal:
ln -s /Applications/Sublime\ Text\ 2.app/Contents/SharedSupport/bin/subl /usr/local/bin/sublime
(added bonus of this approach is when you upgrade to ST3 or change text editor, you can just redirect the symlink).
If there's any chance that bash doesn't check usr/local/bin then use [Launch Sublime Text 2 from Mac OSX Terminal] for more detailed instructions on how to make this happen.