[legalalien]

While I agree with many of the above comments, I also find it easier to use my phone to check email or quickly look something up than to open Chromebook. If you have a (more generous) data plan with your phone, like I do, 3G won't be quite as useful. Especially if you can run portable hotspot on the phone.

 

[legalalien]

Does anyone know if the chromebook keeps track of data usage for you. Or will it cut off or go over and cause overage fees?

It does. When you're connected to 3G, it shows remaining amount of data for the current period.