T-Mobile and Rim have joined forces to make BlackBerry Mobile Voice System (MVS). This is going to be offered to T-Mobile's business customers, as a way to combine their PBX phone systems with RIM's Blackberry Enterprise Server (BES) to receive all of you calls whether at your desk or on the go.
Read the whole article at CIO
RIM had made a move on merging corporate desk phones with Blackberry smart phones over 2yrs ago using MVS. Today RIM is actually trying to step up the game and get enterprise folks involved and more MVS users across the USA, by partnering with T-mobile.
T-Mobile hopes to be offering RIM's MVS to its enterprise customers soon, they will be offering it as T-Mobiles new Wi-Fi Calling with MobileOffice.