-Must be a true road warrior.

I have purchased a few bonds here and there for the kids. Not too many, since over the long haul equities are your best bet.

Disregarding investment philosophies, if you do purchase over the net, purchase toward the end of the month. Interest is based on the first of the month that the bond was sold, regardless.

E.g., my card (1st USA Visa with SWA tie-in) closes on the 20th. Hence, just purchase the bonds on the 22nd, get interest from the first, and you do not have to pony up the $ out of your MMA for another 45 days.

Were it not for the 3 month penalty for early redemption; one could see some real possibilities in the above approach with a perpetual rollover scenario.