What is the plural of iPod Touch? Should it be iPods Touch or iPod Touches?
Consider the following widely-accepted plural forms of popular Apple products whose names consist of two nouns:
- Macbook Pros
- iPod Shuffles
- iPhone 4s
- Mac Minis
- Macbook Airs
Just as one wouldn't say Macbooks Pro, so also one shouldn't say iPods Touch. I would always go with iPod Touches. If that sounds awkward to you, then your better bet would be iPod Touch devices or, best, iPods. Most of the iPods being sold these days are of the Touch variety, anyway. More often than not, one will hear iPod Classic when the distinction wants to be made. Thus, an iPod will usually be an iPod Touch.
Also consider Xbox 360 and Playstation 3. One hears Xbox 360s (not Xboxes 360) and Playstation 3s/PS3s (not Playstations 3). Many technical writers use the words units and devices, or find other means to avoid these potentially sticky "plural" situations altogether.
There's the RIGHT answer, and the right answer.
In English, the rule is generally (adjective) (noun), as in blue car, hot soup, and beautiful sunset. Occasionally, this rule is subverted, as in this case, wherein the noun is IPod and the adjective is Touch. In English, when you pluralize you pluralize the noun, so the correct answer is "Ipods Touch".
Having said that, you'll sound like a pretentious ass. One wouldn't go to Burger King and order two Whoppers Junior. So the accepted plural is IPod Touches, even though you're pluralizing the adjective.
My understanding is that trademarked words or phrases should never be pluralized. Companies actively discourage pluralizing of their trademarks, since that risks turning them into generic terms (Kleenex, Xerox, Dumpster, etc.)
Therefore, treat a trademark like an adjective:
iPod Touch devices or iPod Touch players