I too would like to see improved double rebate format in Rebate Rebate.
For example the handspring visor 2mb deal at staples a while back. It had a staples coupon, a $30 staples rebate, and a $50 handspring rebate. In Rebate Rebate it forces you to make multiple entries so it looks like you bought 2 visors (one with a $30 rebate and the other with the $50 rebate).
Great concept for a program but I keep file folders with all invoices, forms, etc and I scan everything into the comp and create folders on my desktop to store the scans of upcs, forms, receits, etc.