Evleaks says that Verizon is set to offer prepaid 4G LTE starting on July 17th. $45 will get you unlimited talk and text and 500MB of data a month, while data jumps to 1GB for $55 or 3GB for $65. [Evleaks]
For $30 a month with T-Mobile I get unlimited data (5 GB at 4g speeds and then it switches to 2g), unlimited texting and 100 minutes of talk. It's not many minutes but I can use google voice for free to make up for it. I think the big providers are getting scared which is good for us.