Merge All Windows and Split Tabs into Windows in Safari 4

 Silly I hadn't seen this before. But, it's really nice:

Safari 4 makes it stunningly simple to combine all those open windows: choose Merge All Windows from the Window menu. If you’d rather view web pages you have open in tabs as separate windows ‘tear off’ the tab downwards into the window. As you drag downwards a thumbnail image of the web page ‘unfolds’ from the Tab Bar. Drag that image to anywhere on your screen and it opens as a new Safari window.

via mactips.info