Second cheapest plan: CellularSouth $50 unlimited web/text 500mins voice

CellularSouth has a SmarthPhone plan for $50 that has:
- unlimited web
- unlimited text
- 500 mins voice

See more detail here:
https://www.cellularsouth.com/cscommerce/products/plans/product_plan_details.jsp?navAction=push&navCount=0&id=prod22450057

Phones:
CellularSouth currently carries HTC Hero (CDMA version). And has announced that they will introduce Motorola Milestone (international version of Motorola Droid) soon.

http://www.cellularsouth.com/DiscoverCenter/phones-apps/android/coming-soon.jsp


Included Features:

* Unlimited Web and Email
(unlimited access to the Web and your email anywhere in the U.S., Puerto Rico, and the U.S. Virgin Islands)
* Mobile-To-Mobile Calls
(unlimited calls between Cellular South customers)
* Long Distance
(call from your Regional/Primary Area to anywhere in the United States, Puerto Rico and the U.S. Virgin Islands)
* Text
(send and receive unlimited text messages nationwide)
* Call Waiting
(take that second call if you want)
* Call Forwarding
(forward your calls to another number)
* Conference Calling
(add a third party to a two-way call)
* Caller ID
(see who's calling before you answer)

Optional Features:

* Voice Mail (free upon request)
(free upon request - add it to your cart before checking out)
* Phone Insurance
(provided by eSecuritel - protect your phone from the unexpected)
* Nights & Weekends
(unlimited calling from 7:00 p.m. until 6:59 a.m. Monday through Friday and from 7:00 p.m. Friday through 6:59 a.m. Monday)
* Pics
(send and receive unlimited picture messages)
* Ringback Tones
(customize what callers hear until you answer the phone)
* Group Voice Messaging
(send messages to multiple Cellular South voice mail subscribers)