Sakura Pigma Brush Pen

Sakura Pigma Brush Pen
http://sakuraofamerica.com/Pen-Brush
http://www.jetpens.com/index.php/cPath/221_511

Brush pen reviews
http://www.linesandcolors.com/2009/02/02/my-pocket-rembrandt/
http://www.nemu-nemu.com/2008/12/03/brush_pens_review.php

Tombow Dual Brush-Pen
http://www.dickblick.com/products/tombow-dual-brush-pens/