Since I was finding myself doing quite a lot of searches on Stack Overflow recently, I decided to write a real simple plugin for Sublime Text 2 that would allow me to do queries using the current word/selection or user input. It is available on GitHub and will be shortly available through Package Control.
The available commands are stackoverflow_search_selection and stackoverflow_search_from_input which are self-explanatory.
You can trigger them from the Command Palette:
Or through the Tools menu
This is definitely not the most complex plugin ever, but it does save me some time!
Hope this helps someone.