The lovely internals.

NVIDIA Tegra processor front and center. In a stark contrast to Apple's relationship with Samsung, NVIDIA's product page actually has a link to buy the Zune HD.

To the right is the SiPORT HD Radio receiver. This chip supports AM, FM, HD Radio, Microsoft MSN Direct Data Services, and a slew of other frequencies (including the Weather Band).

The SDRAM is Hynix! H5MS1G22MFP J3M 926A. In the upper left, is a 1 gigabit Hynix Mobile DDR SDRAM.

The accelerometer is below the Hynix SDRAM and to the left of the Nvidia processor. It's a Kionix KXSD9.