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You know the way you smoothly zoom-in in mobile safari? How do I do that on my Mac + magic trackpad in regular safari?
Its a pinch motion just like mobile safari. To activate it, make sure Pinch Open and Close is ticked in System Preferences
Wait for 10.7 "Lion" there'll you get the same zooming as on the iPad and you can even double-click on columns to zoom the to full window width.