http://code.google.com/p/android-quill/
Here is a very cool note taking app for Android, it allows you to write handwritten notes. The best thing about this apps is that is support n-trig digitizers. This app will work with any tablet that is running honeycomb or has an active digitizer, I can confirm from testing the app on the HTC Flyer with Honeycomb that pressure sensitivity and palm rejection does work, you can use this app with regular Android tab it just won't distinguish pen and finger touch.