David Pogue of the New York Times reviews Virgin Mobile’s pay-as-you go MiFi: Once you’ve paid $150 for the MiFi itself, you get unlimited wireless broadand on the Sprint network for up to five devices at a time. For an amazingly reasonable $40 a month. If I weren’t on contract with Verizon for a MiFi for the next 18 months–at $60 a month–I’d be on this deal in a nanosecond.