The first mention of the Sharp's Sidekick 4 (a.k.a. Shuriken) dates back to August 2007.
Earlier this month at CES 2008 it has finally been presented as a new PDA, the Sharp PV250. The device has a swiveling display, which can be viewed in different angles, a QWERTY keyboard, a 1.3Mpix camera, and a microSD slot.
This is all we know for now, check back later for more details.
No word on pricing and availability as of yet.