I guess TBH finally gave up on trying to overcharge for this service. They have released the band unlock publicly.
TBH US GSM Band Unlock for Droid 2 Global and Pro Update.zip Public Release
I haven't tried it yet. It won't work with anything other than 2.26.2, so you'll have to SBF back if you are on something else and want to try this. It also won't work on T-Mobile's 3G network.
If you try it, let us know if it works.