Most stylus' have large tips which result in imprecise device interaction and an ugly overall user experience. Evernote wants more people to use its services and partnered with renown stylus designer Adonit to build the best stylus money can buy.
Here is the Adonit Jot Script for Evernote
This is a bluetooth connected pen with an incredibly fine tip
The pen was designed to work with Evernote's Penultimate app with advanced palm detection technology. I can't stress how important palm rejection is. Palm rejection means you can rest your hand on the screen while writing and the software is intelligent enough to disregard it. Because my Nexus 7 doesn't have it, it is impossible to do "good" handwriting on it.
Before you panic though, Adonit is making the enhanced functionality available to third party developers through its developer kit (I expect most ipad apps to include this going forward).
Because the pen's advanced powers come from its Bluetooth connection, it needs juice and that juice comes from a user replaceable AAA battery.
The Stylus can be ordered today (but will ship early November) for $75.
Evernote says. Mobile auteurs can buy the stylus today for $75, and the corresponding Penultimate app is available for free.