Many of my uers are requesting the ability to perform the following

Change Condition - a field changes from any value to any value (including ablity to specify values that change) - at any point in time - not just the latest change. This information is displayed in the change history.

Modified Date - between 7 and 0 days ago - basically to allow both a concept of "today() functionality and "today()" and a range of dates.

Change Author user or current user - change author at a given time - not the user to last update.

Record changed between 11/30/09 and 12/07/09 and authored by Smith, David W
and Status != Closed - again not the user to last update.

This is severely limiting research capabilities of our users as out legacy product had this ability.