I tried the droid for about 30 minutes, and flat keyboard aside, I thought the capacitive screen was pretty, but nothing special. And it wasn't very accurate, and required too much zooming.
i use a 0,5mm mechanical pencil that has a steel tip with my n800 @work. just push the lead in and switch from paper to xournal.
works perfectly with zaggs invisibleshield (the only one that haven't got problems at all, ordered 3 others that were full of ****. as a side note from their constant quality)
OT question: Was the Vikuiti DQC-160 protector or any other Vikuiti brand protectors among the crappy ones you tested?