Absolutely.
I'm going to test drive the wifi only Mini for a week or so before making my final decision. Both options are equally enticing - 5GB to tether or chosing to turn on the cellular Mini's data.
Not a bad idea. Since I have the mobile share plan, getting the Wi-Fi model is a no brainier. Why pay an extra 130 plus an extra 10 bucks a month? If my phone doesn't have a cellular signal, I don't see the iPad having one either.
EDIT* Just noticed I'm still on Bluetooth and my iPhone's battery has only dropped 2% in 20 minutes.