S2k has just added (Sept 2007) the ability to find items changed from a specific date. This is only available from 12th September 2007 onward, so any changes before that date will NOT be available. This search field is available under “Inventory” or “Price Book” to assist in finding newly changed items:
From the drop down list in either “Inventory Menu” or “Price Book menu”, first select Last Modified On and then use the next field to define the specific requirement:
Then select the date from the drop down list and search as usual. That will give you a list of all items changed based on this criteria.