According to a variety of sources -- the phone is *not locked* you can test this by putting a TMobile/ATT SIM in the phone. If it does not come up and ask for a code, the phone is *unlocked*. Typically when you put in a competitors SIM it will ask you for a code.
However, VZ/Motorola has done something to the firmware to prevent it from being used on ATT/TMobile networks, even though it will work with foreign SIMs. You'd have to root the phone or something to get around that one.