They've made it much harder to find on the website. Several people have linked it above, or you can find it by going to the "Pay in Advance" link on the page (it's near the top and at the bottom). From there you can find the prepaid plans, and the $30/100min plan is still listed. I honestly wonder how much longer it will be around for new customers, though. All of the "bring your own device" links go to the new plans.