Simply display a different theme to your Apple iOS (iPod/iPhone/iPad) users.
Another plugin to check out is WPtouch; but depending on your needs, it may be overpowered.
This plugin becomes especially useful with WordPress-powered full-Flash websites. Since Apple has chosen to block Adobe Flash technology, your markets may require an HTML fallback.
Questo plugin è disponibile per il download da usare sulla tua installazione WordPress ospitata personalmente.