The chip beside the ARM one is a BGA. If I had to guess, I'd say it's probably a small FPGA.
Oh I see. I thought you guys were talking about the "ASICs." Interesting guess, I'm curious what they would be doing with an FPGA on board. Seems a little pricey to just be used for controlling the ASICs. I'm guessing the Atmel chip is probably something like an atmega 2560 micro or something they're using for control or comms (especially since it's near the FTDI chip).