Z, I hate to be a downer, but you're technically incorrect with your headline. I'll clarify here shortly.
Alrighty folks, I've got official news straight from the horse's mouth regarding the Platinumtel relaunch:
First is the most important for pre-existing P'tel customers:
CDMA USERS - THEY WILL BE TERMINATING CDMA SERVICE THROUGH SPRINT BETWEEN MARCH-APRIL 2013!
For the CDMA users who stay with until the end before porting out or switching over to GSM, the new recharge rates and airtime expiration rates apply. This applies to both the monthly and Real PayGo users for cost, features, and airtime.
Next up on the good news front, CDMA users who migrate to the GSM service will keep both their number and their airtime balance in the transition. That means all those credits you pre-existing users have? You get to keep them!
Finally, clarification on the Woot deal that Z posted the coupon code for. I got details regarding the coupon and the value... this isn't going to work for Real PayGo use. Full stop, no exceptions. The promotion is for the SIM card and a credit for the $40 Unlimited plan only. For pre-existing users, the $40 credit cannot be applied to the account without first switching to the $40 Unlimited monthly plan which wipes out any existing Real PayGo balance. New users who sign up for the Woot deal will have to start with the $40 Unlimited package, and they can convert the account over to Real PayGo, but the balance does not go with it as the conversion apparently happens after completion of that monthly billing cycle. So no, there's no way to use that $40 credit towards the Real PayGo service... so there's no five months of P'tel service for $20 deal. Unless you're going with the monthly plans or already on one and staying put, most everyone's going to be better served just spending $5 on the SIM card instead of dealing with the Woot coupon.
EDIT: The Woot coupon is a $24.99 credit that applies to any shopping cart that has a SIM card and $40 or more of airtime cards in it, Unlimited or PayGo. I stand corrected, and my sources appear to have been incorrect. Day one of relaunch, there's bound to be conflicting info. C'est la vie.