They are just the KiNGS. Engadget has got this fantastic dialogue:
It took us a few days of harrassing Apple’s PR department, but we were finally able to answer one of the most
burning questions of the past seven days: Is it ‘iPod shuffles’ or ‘iPods shuffle’? Here’s a transcript of our
conversation:

US: Thanks for calling us back. We have a really important question for you. How do you pluralize
‘iPod shuffle’?

APPLE: Like in a sentence?

US: Yeah, like would you say ‘iPod shuffles’ or ‘iPods shuffle’?

APPLE: Huh. ‘iPod shuffles’. It’s ‘iPod shuffles’.

US: Are you sure? Would you mind double-checking, because people do say ‘attorneys general’ and
not ‘attorney generals’. We don’t want to offend William Safire and write the wrong thing.

APPLE: Let me ask someone here. [puts us on hold for a minute] Yeah, it’s ‘iPod shuffles’.

US: Thanks!

(Via Engadget.)