I am really baffled by this distinction.
I clicked "about:" and it said:
Each website is focused on a specific topic :
Stack Overflow (software development)
Server Fault (system administration and IT professionals)
Super User (computer enthusiasts)
iPods have a lot of functionality beyond music. They have USB-drive mode, support for Syncing contacts, etc. They interact with most of the Apple technology pyramid, and area lso highly compatible with the installed Windows-base.
There are a lot of actual models, with a large variety in the continuum of functionality. I'm not really sure how you can simply razor out some models, based on complexity. If we applied that to computers, shouldn't we also start (arbitrarily) deciding that certain parts of PC's are "proprietary", or "external", or "mp3" players. Should we close posts about USB drives (external), MP3 software (mp3)?
In my opinion, iPod posts should be allowed, and we should make sure they are tagged correctly. (Joel has mentioned something like this in the podcast...).
Lastly, I don't understand the how-to-geek tie in. I see them in the footer, but there is no description in about, and from looking at the site, it isn't obvious to me why some content would be in SU and some would be in HTG. The site is completely different, and I don't see how they work together in this sense.