Direct Refills for Amp'd and Boost

BabbleBug just came out with instant, direct (no PINs required) refills for Boost Mobile and Amp'd Mobile. You give them your phone number, pick your refill amount, hit Buy and wait for the airtime to show up on your phone. Boost Mobile even has a "flex-payment" option, where you can pick your refill amount, whether that's $10 (the minimum...you pay 50 cents extra for purchase sunder $20) or $97.52 ($99 is the max). Neat, huh?