The other day I recall hearing someone mention on the newsgroup that ink didn't have pressure sensitivity well I wanted to give some info.
In ON2007 I believe the default ink pen size is 0.25 which doesn't have pressure sensitivity. The old default in ON2003 was 0.35 which does have this sensitivity turned on.
So if you want pressure sensitivity to work in OneNote 2007 make sure to change to a pen of 0.35 or greater! Have a great weekend all!