I recently signed on with Authorgraph.com (with the likes of E.L. James, author of 50 Shades of Grey) to provide autographs to my readers.
Formerly Kindlegraph, this new service enables authors and readers to interact through digital books. Now I am able to give personalized, handwritten autographs digitally! (Yes, they are handwritten.) Once you request an autograph, it will then be sent as a PDF directly to your Kindle or PC.