The new BlackBerry 8800 phone has a trackball navigation on the front just like the BlackBerry Pearl 8100 series.
It also includes a full QWERTY keyboard unlike the Pearl which combines two letters to each key (see comparison picture above).
Another interesting feature in the BlackBerry 8800 smartphone is the media player that lets you play music and video in all popular formats. Files can be transferred to the Blackberry via USB or Bluetooth.
BlackBerry 8800 Home | Blackberry 8800 Demo | BlackBerry Tutorials
(Don't think the BlackBerry supports Flash Video yet)