Are your users not on the web at all? If you're selling software in 2010, I'd certainly expect so. I'd recommend you take a look at Patrick's "Bingo Card Crea

Are your users not on the web at all? If you're selling software in 2010, I'd certainly expect so. I'd recommend you take a look at Patrick's "Bingo Card Creator" posts for inspiration-- he's been successfully selling software (up until recently, non-web-app software) to about the least net-savvy bunch of users most of us could imagine.