Samsung SCH-u740 (silver, Verizon Wireless)

Pros: Thin and Light;
Full Keyboard with good tactile Key Feedback;
1.3 MegaPixel Camera;
Music Player;
etc...
[Look up the extensive feature list for the rest]

Cons: Hinge seems sturdy, but, like any other dual-flip phone, its limits are unknown until it receives just a little too much stress, and breaks

Summary: If you can commit to taking care of this phone [making sure the hinge doesn't receive undue stress], this phone is WELL WORTH IT.

For somebody like me, who will only buy clamshells, but also needs a full keyboard, that commitment was easy to accept.