[Feature Request] Mac-like "File Drawer"

I have noticed several feature requests asking for the functionality of the "file drawer" that TextMate offers for Mac users.  Sadly, it would not be possible (or more accurately, not feasible) to duplicate all the functionality of the "drawer" that TextMate provides, because AFAICT its actually part of the OS X operating system that allows it to work that way.

That said, something similar in the most basic ways would be helpful:

Say, you have five different files open, all from different directories.  When you select each file, a sidebar will populate with the contents of its working directory (and any subdirectories).  If you select a different tabbed file, the sidebar repopulates with THAT file's current working directory.  And of course, double-clicking a file in this sidebar would open it into a new tab.

Additionally, it would be useful to have an option to open a folder via a shell extension and/or menu option, rather than just a single file.  Such that, opening a folder results in all files in said folder being opened into their own tabs. (It wouldn't be necessary to recurse into subdirectories of course).