Sprint's rumored dual slider messaging phone, the Samsung Lucello, has received a more concrete name and launch date courtesy of a leak. The device is now identified by SprintGurus as the M550 Exclaim and, as promised, has a user interface focused heavily on social networking: the front menu has quick access to the web and Google searches but also Facebook and MySpace. It should also come in blue and pink models and ship on June 7th, roughly and unusually at the same time as the Palm Pre.

The Exclaim has already been pegged as a mid-range phone outside of these features with a 2-megapixel camera, EVDO Revision 0 and Bluetooth. Its pricing hasn't been identified but should be relatively inexpensive on a contract.