In the UK, this is popular:
http://www.amazon.co.uk/AceCAD-DIGIMEMO-A501/dp/B000JWIBLY/ref=sr_1_38?ie=UTF8&s=electronics&qid=127
4515348&sr=8-38
Nearest equivalent would be this:
http://www.amazon.com/SolidTek-DigiMemo-692-Digital-Notepad/dp/B0009OD4CS/ref=
sr_1_fkmr1_3?ie=UTF8&qid=1274874854&sr=8-3-fkmr1
They both use ordinary paper and capture text digitally to be downloaded to your pc...