from The Mac Observer
TMO Quick Tip: OS X Lion: Cut and Paste (Finally!)
I did not know this, but Mac users were NEVER able to cut and paste files in folders like the way Windows users have been able to do in folders (like My Documents, etc.). I it was never possible until now……
The article above will tell you how.
Cut (Copy): Command + C
Paste: Option + Command + V
OSX 10.7 Lion users only!!!