Big players on the GSM iPad 2 3G board include:

Intel 36MY1EF containing 128Mb of Numonyx NOR flash and Elpida Mobile DDR SDRAM.

Infineon 337S3833 Baseband Processor

Skyworks & TriQuint Transmit Modules

Infineon 338S0626 GSM/W-CDMA Transceiver

Broadcom BCM4751 Integrated Monolithic GPS Receiver; an update from the BCM4750 found in the iPhone 4.