Andy Ihnatko's pick on MacBreak Weekly episode 375 is Jot Script by Adonit. Jot Script is a new stylus that strongly resembles a ballpoint pen for handwriting notes on iPad. It uses Bluetooth 4 and runs on 1 AAA battery.
Jot Script will work with any app on any iOS device, but Adonit's software development toolkit allows developers to increase its functionality. "Jot Ready" apps improve the accuracy of the stylus, and feature palm rejection. Penultimate by Evernote is an app specifically designed for use with Jot Script. These features require a Bluetooth 4 capable device.
Jot Script is not pressure sensitive, but those looking to do artwork can opt for Adonit's Jot Touch instead. For handwriting notes and diagrams, however, the Jot Script is a great choice. Jot Script is $74.99 at Adonit.net.
For more on Jot Script from Adonit, check out MacBreak Weekly episode 375.