The Sidekick Slide, made by Motorola, is having some problems. When users slide it open or closed, it has a tendency to turn itself off.
This makes using the phone an uphill battle against the constant fear of your phone turning off.
T-Mobile has suspended sales of this device and is telling current users of the Slide to take their phone into T-Mobile stores to "discuss available options."
The other Sidekick versions are not affected.
Engadget: T-Mobile suspends Sidekick Slide sales