Two more anorexic phones are heading to the T-Mob, as the FCC has just cleared them for departure. The Samsung T629 is a slider with a microSD slot and 70MB of internal storage. It has a 2-megapixel camera and probably won't have TV-out capabilities like the Samsung D840 it's based off of, seeing as T-Mobile has nothing going in the mobile TV area.
The T519 is a candybar phone that looks similar to the Moto SLVR, but is 7mm thick and has 80MB of internal storage and probably a microSD slot as well. This one, like the T629, has a 2 megapixel camera for snapping pics.
T-Mobile To Get Ultra Thin Samsung Slider and Candy Bar [Phone Scoop]
T519 FCC [FCC]
T629 FCC [FCC]