The slogan, a once standard tool and form in advertising has become unpopular in advertising, its effectiveness questioned and characterized and old fashioned. I just came across this posting on the MIT Advertising Lab.
Study: Old Ads More Memorable
"A new study into the memorability of television adverts found that those from the 1970s have proved to be more memorable than their modern-day counterparts. The researchers believe this is because so many now rely on visual graphics, style and big budget effects rather than clever catchphrases and snappy slogans." "Beanz Meanz Heinz", created in 1970s, today shows an impressive 53% recall.
Why do you think that every Simpson's character has his own sound-bite.
A good slogan is a powerful meme that can bore into people heads.
Here is a link to the Ad Slogan Generator.