As mentioned in the above link, Visual Studio has a great Opened Files dialog (Alt-tab).
Sublime Text 2 has currently a Go next/prev Stack which is just short of this functionality. There really needs to be a "Show stack" keyboard shortcut to show the files in the editor in a given order (last visited - stack, last modified, alphanum).
I don't think it necessarily have to bring the list in the sidebar. This is a temporary view that is closed as soon as you select the file you want from the stack list. It is like a search window in that sense.
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