Some guy who is much smarter than we are has created a conductive stylus for his iDevices. Though our fingers are our preferred device with navigating around the iPad and iPhone's interfaces, a stylus is the most practical when it comes to painting programs such as Brushes for iPad.
Above, you will the stylus in action. He does a side-by-side with the Pogo stylus, but explains that his has a bit more weight and thickness, giving it s more full-sized pen feel. He also shows off some awesome painting skills while he's at it. Though this is nothing more than a project he made himself, it looks more awesome than any of the stuff we've seen out there.