If I edit a document, or shift a document, outside of Sublime Text 2 it doesn’t seem to be aware of these changes.
If I’ve edited a file it could let me know that changes have been made outside of Sublime Text 2 and ask if I’d like reload the file.
If I’ve deleted a file, it could let me know that the file has been deleted outside of Sublime Text 2 and ask me if I’d like to save a copy or just close the file.
That would be really cool.