The bottom side of the logic board:

Apple A5 Single Core processor

The A5 PoP assembly breaks down into a Hynix LP DDR2 SDRAM and an application processor that carries the part number APL2498 and 8942C01 (third image). Thanks Chipworks!

Toshiba THGVX1G6D2HLA01 8GB NAND Flash

Broadcomm BCM4330 (appears to be the same chip in the iPad 3rd Generation).

Apple 343S0479

Apple 338S1040