I want to use it for taking notes. Thanks
I'm afraid that Aha! Inkwriter was purchased by Microsoft and used as
the basis for the Journal software in Windows XP Tablet PC edition.
That said, there are some programs:
http://blog.evernote.com/2010/04/03/evernote-for-ipad-is-here/
http://itunes.apple.com/us/app/ideate/id364169711?mt=8
http://www.appstorehq.com/whitenote-ipad-210220/app
http://itunes.apple.com/us/app/sketchpad-vector-drawing/id364220552?mt=8
Evernote is the only one which _might_ offer handwriting recognition
though.
Most likely candidate would be:
William