Great article... Talking about paypal, I actually use paypal merchant account services (pro version) and I highly recommend it to anybody selling ebooks etc... It takes credit cards like any other merchant account without the need of buyer having a paypal account... Secondly, the buyer doesn't have to leave the site for the check-out process (pro version). I also use "all in one SEO pack" plug-in for some of the blogs i want to earn money online or other similar topics... this particular page has a life-changing effect by the way.

Keep up the great work my friend... adding value to others who need it...
Ozgue