So the Samsung Galaxy Note has a stylus and the screen is supposedly a Wacom digitising tablet with 128 levels of pressure sensitivity. Has anyone tried to make it work as a Wacom tablet for a desktop? I'd even be interested in kludge solutions (eg, you draw a shape, it transfers it over wifi, and an app on your PC stores it in the clipboard, so you can just paste it somewhere).
Unified Remote could satisfy your desire in another way. It can make your Note run as a touch pad and as soon as you have a stylus pen you can open Photoshop on your PC and start painting in it with your stylus.
Unified remote has a free and a full version.
Use Galaxy Note as digitizer or graphics tablet for PC (small project of mine) - maybe this could be relevant, but not exactly what you are looking for. But I found this post based on my search query, so maybe it could be interesting to someone else.
You might want to look into the S-Tablet app.