The Wacom Bamboo Stylus for the iPad isn't the first stylus created to work with Apple's tablet, but it might be one of the most comfortable we've ever used. The $29.99 stylus has a similar heft to a real pen, and has a soft rubberized tip.
A detachable pen-clip on the back could be useful for clipping on the back of a case, but not many cases we own have dedicated storage pockets for styli. A matte-textured barrel is about as thick as a ballpoint pen's.
The Wacom Bamboo Stylus side-by-side with a Pogo Sketch stylus. They're both nearly identical in terms of length. The Sketch has a foam tip and a thinner, lighter design, whereas the Bamboo feels much more substantial.