Anyone Informational Marketers there?

I'm a relative nub in online and informational marketing of digital products. I started learning in Feb this year, and just finished my first product. I been collecting cash and checks for now, but it's time to do it online!

It seems the cheapest way is to use paypal and aweber to automatically fulfill and auto-respond for digital products, and then use paydotcom for affiliates to sign up and promote. Any other suggestions?

Thanks!