Cheapest two Verizon options are:

PDA/Smartphone Nationwide Email 450 - $79.99 (plus whatever text plan you want, $5 for 250, $10 for 500, etc)
PDA/Smartphone Nationwide Email & Messaging 450 - $99.99 (includes unlimited text)

This is pretty much the exact same price as AT&T. I used to get unlimited data for $20/month with AT&T thru a little bit of a loophole but that went away when I joined the cult of gadgets named after fruit.

Side note: I just discovered that there's no full-featured Skype app for Android yet. So................that needs to happen before I'd consider jumping ship to the cult of gadgets with names officially licensed from Lucasfilm.