Update: In case you missed it, it looks like those Zact Mobile users out there who feel like they were left stranded now have an official new service option in Virgin Mobile. Recently Sprint announced that Virgin Mobile users, come August 9th via Walmart, will have the option to customize their plans with a la carte pricing for text, data and voice.
The service will be powered by the same platform that handled Zact Mobile, and in fact you can test out the plan selection interface here. Those of you who are familiar with Zact mobile will instantly feel at home. There are some new options available that differ from Zact for instance they are offering add-ons such as unlimited Facebook, Twitter or music for $5 each that don't count against your data cap. Initially the plan will be offered on 3 less than stellar smartphones. I'd have to imagine they'd let you port your previously purchased Zact phone to the service. Instead of switching to this service though, I recommend you take a look at RingPlus and FreedomPop whose plans seem to offer far better value unless you need those special add-ons.
Update: Sprint MVNO Zact Mobile is officially shutting down come August. Zact mobile was powered by a startup company called ItsOn and now Sprint plans to use the ItsOn technology to offer something similar although not quite the same as Zact. According to ItsOn Sprint will allow them to do far more and have greater reach compared to what they could accomplish with Zact alone. No specific launch dates or pricing have been announced yet for the new service.
Judging by what was found in the Howard Forums it appears that Sprint MVNO Zact Mobile could be rebranding itself or merging with another MVNO. Prior to this change though, current Zact users will get 1 month of free service starting on or after July 4th depending on when your next billing cycle starts in relation to that date. You won't have to do anything special to receive the free service, your credit card simply won't be charged for that month. According to the forum, a current customer received an email which in part stated:
"WWe are pleased to let you know that there will be exciting changes coming. A new wireless service that offers the same features as your Zact service will be available very soon. This new service will include additional service plan options and choices to help you get the most out of your mobile experience. If you’re interested, you will have the ability to move your Zact phones to the new service."
So unless the poster is a fraud, it seems big changes are in store for Zact, if it even retains that name. A partnership with Ting would certainly make a lot of sense to me as their plans are somewhat similar as they offer a la carte texting, data, and voice as opposed to bundling all the features together. This is purely speculation on my part though, but we'll see what happens in the next month.