Microsoft stopped using "Where do you want to go today?" around 2000, for the past 5 years or so it's been "Your potential, our passion" everywhere and "People_Ready" for their business software.
Companies don't need slogans though, Apple doesn't have one, I think that's saying something.
Okay, they don't really say it so much anymore. But...I'd argue that most of Jobs' advertising one liners do the effect of a slogan. "World's most advanced operating system" "Most brilliant piece of engineering" ... they give the effect that Apple is leagues
ahead of everyone else.