Hat tip to Michael Robertson who found this one.
As a MiFi user who has tried all three networks (Verizon, Sprint and AT&T) I'm happiest with Verizon in the areas I regularly travel to. Some, like Jason Harris, tell me the Sprint smokes the speed tests, and I've found that to be true until recently in my home area (I know, when am I ever home) but either way, if you want a MiFi head over to Amazon and grab one now.
The primary difference I've found is the Sprint version does active GPS.
Either way, this is a very good deal for those who want to stay connected.