Its definitely Dean Kamen...
http://www.rollingthunder.smugmug.co...8831938/Medium
Signing of the Arm isnt new

Woodies and Deans are both on Mark's arm in the photo, Deans being in the center, and closest to whats on her arm... the K is a bit fuzzy in this picture, but you can tell its the same.
If you look closely here you can kind of see what the first part of the signature looks like
http://www.rollingthunder.smugmug.co...31930/Original