GreenBulb's Xstylus Touch ($39) is one of the more unique capacitive styluses we've seen so far; it's the kind of thing that takes a few minutes of playing with to really figure out. The plastic body surrounds a metal core that flips around, making the accessory resemble a barber's straight razor. One end is thicker than the other and expands the plastic, which creates a wider grip the company touts as a benefit. That core is also magnetic and connects…