Ha! I did the exact same with same two device dimensions, but using thick (corrugated) cardboard.

after a week of looking at both, I'm quite happy with the note's size - even holding it up to my ear no longer seems so stupid as it first did :-)

the note is supposed to go on sale in UK tomorrow (2nd Nov) so I'll have a trip to Carphone Warehouse to see if they've got a demo model to play with ....