Buying a Verizon G2? You might want to think twice about rooting it, because Big Red has specifically configured its version of the device to show whether or not the phone is rooted in the "status" sub-menu of the About Phone area. Why? Almost certainly for the express purpose of voiding warranties or returns for people who screw up their phones (or, allegedly screw up) after rooting them.
I have confirmed the rooting status flag is also present on my Verizon G2 review unit, but not the AT&T or international unlocked variants.