Support for jumping to a Symbol as well (shift-command-t in Textmate/Textmate.el)
Not as applicable and important as finding files, but it would unify interfaces a bit.
Interesting, but how does the app get the list of symbols?
Just like this (in the case of Emacs anyway):
http://github.com/defunkt/textmate.el/blob/master/textmate.el#L225
So the app needs to implement the functionality to each text editor? That could be nice as long as topfunky can maintain...
You could avoid having to implement the functions for each editor if you allowed an editor's normal shortcuts to be used from the search dialog.
Once the file you want is listed at the top of the dialog pressing any key combo could open it. That would mean you could do: highlight file in dialog, cmd-shift-t to both open the file and open the jump to symbol dialog. Pressing escape could still be used to dismiss the dialog.