Jolt Mobile: New US Prepaid
 

Another prepaid by the beyondGSM group


name: Jolt! Mobile
SIM-only: Yes!
rate: http://www.joltwireless.com/airtime_rates.php
coverage: http://www.joltwireless.com/coverage_map.php

It's not great for low users though - the minimum monthly cost is $10, and to get that you have refill every 15 days. Strangely, the cost per month goes UP with longer refill intervals, to $33.33 a month if you want to refill every 90 days.

It's been on sale at Onreroam in the UK for a while, but they mark up the tariff to 35c, which is probably why I forgot to mention it