Well, it can actually multitask as it's an OS-X kernel, but since there's no task switcher, you have to quit one app before starting the next. Jailbroken iPhones can have multitasking, from what I've heard.
They're maemo and MeeGo... "Meamo!" sounds like what Zorro would say to catherine zeta jones... after she slaps him for looking at her dirtily...