We've just laid our hands on the Samsung Galaxy Note 10.1" tablet for the first time and we came away quite impressed with this little Android device. It is unique among Android tabs in that it sports a good active digitizer (Wacom?) that can be used as a writing implement as well as a cursor/pointer/mouse substitute. Furthermore, it sports its own handwriting recognition engine that can turn ink into text for the input of handwritten data into browser windows etc.! The output of the pen is smooth and precise and the handwriting recognition seemed to be at least as good as that found on Windows 7.
In short, the Galaxy Note has all of the requirements we feel are necessary in an Active Ink platform. Unfortunately, we don't yet offer an Android version of Active Ink and since only one Android tablet (the Galaxy Note) has passed our platform muster so far, we're not exactly jumping up and down to do so. But if more new tablet following in the footsteps of the Note, you never know!