Whether or not you use the online bond purchasing for "churning" the system or just to invest, why not get the most out of it. Miles, cash back--either. I have been buying online for years. I used to buy through payroll savings but WHY when I could reap some extra bennies. Later, I became even more savy and learned to wait for the credit card airline sponsors to come up with their annual double miles promotions. Delta and United credit cards and the US Treasury have gotten me more than a few flights while simultaneously "pushing" me to these save investments. Oh well, now I have to keep the bonds for 12 months vice 6(effective 1 Feb 2003). A price to pay, but at least the program is still available (for now).