AppleScript to switch to the current Finder directory while navigating the command line. Run as a TextExpander snippet (set to "AppleScript") for maximum utility.

CD2DIR.applescript

tell application "System Events"
  tell process "Finder"
  	if window 1 exists then
			tell application "Finder"
				set thePath to get quoted form of POSIX path of (target of front Finder window as text)
				return "cd " & thePath & return
			end tell
		else
			display alert "Finder doesn't have a window open." as warning giving up after 2
		end if
	end tell
end tell