The disassembly includes high-res photos of the internals of both devices. The folks at iFixit say that Apple did some clever things with the iPod touch speaker. It's 0.2mm thin and mounted directly on the metal backplate. The second generation touch has a Broadcom BCM4325 Bluetooth chip. The Nike+ runs on the same frequency (2.4GHz) as Bluetooth. It remains to be seen if the Bluetooth chip can emulate the proprietary Nike+ protocol.

iFixit says this iPod is somewhat difficult to take apart-- fairly similar to the previous iPod touch. The 4G nano screen is the same resolution and physical size as the previous "fat" nano 3G. The display cover is a piece of curved glass that physically separates from the case. The glass is .7 mm thick on the edges and 1.7 mm thick in the middle. The nano has an updated Samsung-manufactured ARM processor capable of running all the fancy new games and software features.

iFixit plans to provide replacement parts and complete repair instructions for both iPods. Fixit Guides for every iPod and Mac laptops are available free at Fixit.com/Guide.