same story this year, minimal use of the pen. watched movies flipping the screen around (while my ankle healed), it's more enjoyable that way.
biggest prior use was taking notes and my current project simply doesn't have that demand. so my tablet usage (well tablet mode) has really declined.
also i got a decent usb mouse, nice compact travel size. i like the track pad, but a real mouse is better. i was thinking wireless, but went with the "retrak" optical model instead. packs up really well, no batteries, and no wireless fuss (i hardly notice the wire anyway, and that retrak cord is awesome).
so this year, i used the mouse to mark up my gps map, was really fast (faster than tapping on the screen). so no pen there.
oh, another one of my friends was really jazzed by the whole conept (showed off my tablet). he works in construction and modeling houses. had trouble buying an acer and went with ibm. last time i asked, he said it was a great solution for him. i'll have to check and follow up to see if that's still the case.
as for me, i really like having my pen, and the option to use it. even if i used *even* less this year.