This was the first sort-of smartphone to come pre-packaged with AIM for instant messaging.  
Applications for this device contain special metadata added to jar packages to become .bndl files.  Lots of data on a service this device connected to was lost in 2009 while most of its developers were working on Project Pink.  The third version of this device came in special color schemes called "Diane von Furstenberg" and "Dwayne Wade".  The "menu", "back" and "jump" buttons were always accessible on this device.  The company that made this phone, Danger Incorporated, was bought by (*) Microsoft and released the infamous Kin phone.  In 2005, the contact info for lots of celebrities was exposed when one belonging to Paris Hilton was hacked.  This was the first sort-of smartphone to come pre-packaged with AIM for instant messaging.  For 10 points, name this phone whose name derives from the screen that could be flipped 180 degrees to access the full qwerty keyboard.
Applications for this device contain special metadata added to jar packages to become .bndl files.  
Sidekick [or Danger Hiptop or Mobiflip or Sharp Jump]