Zune HD owners are able to update their software in order to -- you know -- have a working device, we can understand Anything But iPod's eagerness to stop trying and just crack open Microsoft's newest entrant into the portable media player market. Without getting too gushy, we can definitively say that the innards look just as sexy as the exterior, but unfortunately the make and model of the internal WiFi chip (amongst other things) remains a mystery. Hit the read link for a nice gallery of closeups, but be sure and shield your screen from any lingering cube passers.
Update: iFixit just went live with their teardown as well!
Update 2: The iFixit teardown is complete. While there aren't any 802.11n WiFi or vacant camera-space surprises like those found inside Apple's iPod touch, the Zune HD doesn't need any to pique our interest. What you will find photographed in exquisite detail is the NVIDIA Tegra SoC, SiPORT HD Radio module, Toshiba-sourced flash NAND, a 2.45Wh battery, Wolfson MIcro WM8352 audio subsystem, and Foxconn logo confirming its manufacturing origin. There's also a "for our princess" inscription meant as a tribute to a Zune team member who passed away during development. Check the gallery for a tease or head over to iFixit to get knee-deep in it.