Wacom tablet, stylus or digital pens are well-known tools for computer graphics artists/creators.
Recently a new smartpad device - Bamboo Slate is released.
Write your notes and ideas naturally with a pen on any paper. With the push of a button, Bamboo Slate converts your handwriting into "living" digital files.
It is a good tool to initiate the workflow from analog input to digital work.
Inkspace App and Cloud Service
If you are Wacom Tablet user, you know their software and service of Wacom Inkspace. The handwritten data with Bambo Slate is also handled by Inkspace App/Service and you can edit and export sketches to vectors or PSD files to your desktop computer.