Flyspray patch 7738 - which implements proper scroll wheel acceleration for all the click wheel iPods (see below for list) was committed to SVN this morning.
We'd been waiting for quite a while for someone to test this on a Greyscale 4G and on the 2nd Gen Mini - but frankly got fed up with waiting
So if anyone has issues on either of those players - please let us know.
List:
4G Greyscale
4G Photo / Color
5G Video
5.5G Video
1G Nano
2G Mini