Who honestly cares? I mean, it would just be like the N90 when t-mobile had that briefly. Slight firmware intrusion (although really only their settings and no menus, unlike the way cingular craps all over their S60 firmwares), and it's going to be locked to T-Mobile. Right there, that shaves $150+ off the market value, especially since it's un-unlockable.
Now, if it somehow was a T-Mobile compatible 3G phone, that's worth talking about