Nearly three years after its introduction, Impac Mortgage is still relying on its private label underwriting technology to contribute a healthy revenue stream as well as power its own processing efficiencies. Diane Keane, senior vice president of sales, noted that Impac Direct Access System for Lending, or iDASL, is one of the foundations for the lender’s business strategy of competing with product and services. She was a panelist on Inside Mortgage Finance Publications’ recent audio…