All the dirty details:
Infineon PMB6952 / S-GOLD3 six-band UMTS / HSDPA transceiver (as we'd heard)
Murata LMRX3JCA-479 tri-band amplifier (we're assuming for the 3G)
Sony SP9T antenna switch for GSM / UMTS dual mode
ARM 1176JZF-S - Main CPU (same as in 1st gen iPhone)
Skyworks 77427 chip - UMTS / HSDPA tx 1900MHz, rx 2100MHz
Skyworks 77414 chip - UMTS / HSDPA 1900MHz
Skyworks 77413 chip - UMTS / HSDPA 850MHz
Internal build model number: n82ap (1st gen iPhone was model m68ap)
UMTS Power Saving option - on or off
Hooks for Global Locate Library (GLL), software that handles A-GPS related commands for the host processor