Geeklets - notes.applescript - http://www.macosxtips.co.uk/geeklets/system/need-help-with-this-script-/

notes.applescript

tell application "Notes"
  activate
	delay 0.1
end tell

try
	tell application "Notes" to get note "geeknotes"
	
on error
	set output to "No current note called geeknotes"
end try

-- now you have one note which has:
-- body
-- name
-- other properties
-- did you want to iterate through the lines of the note?


-- or maybe you have a folder called geeknotes?

try
	tell application "Notes" to get folder "geeknotes"
	tell application "Notes"
		set notelist to every note of result
	end tell
	
	repeat with i from 1 to number of items in notelist
		set this_note to item i of notelist
		-- again, you now hoave one note with the same properties I mentioned earlier.
	end repeat
	
	-- if you just wanted to count the notes
	-- skip the repeat above and
	set output to number of items in notelist
	
on error
	set output to "No current folder called geeknotes"
end try

-- use AppleScript Editor to see what properties a folder has
-- there will be a list of notes to iterate through.