We have had numerous requests for better search options for discounts. It really needs to be on the advanced invoice line item search, the super invoice line items search, and other sales and invoice searches. Steve did make a discount search page but it somewhat limited and needs to be fleshed out a bit. See the top_secret/custom/sales_salesperson_specific_discounts.cfm for more details. Another thing that we really want to do is build out the advanced invoice line items search (and super line item search) to allow for checkboxes (build your own report). That way we could show taxes, categories, prices, costs, locations, discounts, etc.