PhoneScoop has caught wind of a Samsung announcement of a new phone for MetroPCS: the r310 Byline. The best way to describe this phone is as a ChatLink-enabled, dual-color-display clamshell version of the r210 Spex. As such, I'm guessing the price will be in the $100 range. So if you don't want a camera in your phone, but you do want a decent-quality flip, this phone is MetroPCS's answer to your desires.
UPDATE: As I predicted, the Byline is now available, at $99.