I use my PDA for note taking all the time. I have a PocketPC without a built-in keyboard. I have a thumb keyboard that I can attach for note-taking but have found a much simpler solution. I have PhatNotes and Calligrapher installed. I take notes at meetings in handwriting just like paper. When I return to the office, I can have the notes converted to text if I want to save them for future reference, or I can save them in the handwritten form if having them in text is not important.