This information has yet to be confirmed, but a "trusted source" at Berry Reporter claims that the BlackBerry Curve 8900 will be available for T-Mobile business customers on January 19th.
Did Elon Musk Regret Buying Twitter? | Walter Isaacson Interview
For those keeping track, that is a little over three weeks before the confirmed, nationwide release in February (most likely the 11th). [Berry Reporter via IntoMobile]