Sadly, the Streak's LCD is permanently adhered to the front panel glass. However, that LCD/glass subassembly is held in the front panel with very strong 3M adhesive, and could be removed with enough careful prying.

The inner face of the front panel assembly isn't all that exciting. The ear speaker and vibrator motor can be seen near its top edge.

The touchscreen ribbon cable houses:

Pixcir's controversial Tango S32 Touchscreen controller

Atmel's ATmega168P 8-bit AVR microcontroller