When you have used the new Quick Look feature on any document, you can then use the arrow keys (or the mouse) to navigate, just like normal Finder operation. This means that with a little keyboard command wrangling (especially command-~ to cycle windows), you can keep Quick Look open as you browse through folders, connected volumes, etc..Additionally, when in Quick Look mode, you can use Command-C to Copy the previewed items to your clipboard -- exactly like you'd expect.[robg adds: The Quick Look window seems to behave as an Inspector window -- floating, and changing as your Finder selections change. Since the Finder is the frontmost app, the copy feature is that of the Finder, not Quick Look.]

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