Is it possible to use SGN/other devices outside Verizon's LTE network?

The carrier I'm currently subscribed to has HSPA+, so I'm pretty sure I can use the GSM version of the Galaxy Nexus to take advantage of it. However, they are finally launching their LTE network after testing the past few months early in 2012. Will it be possible to use the SGN from Verizon here? Like, can it be unlocked, or something? I'm not aware of any LTE device that is unlocked..