Let's talk about brands, branding and slogans.
Al Ries on Adage writes an article about "Wasting money on bad advertising slogans", explaining how a brand could invest $40 million dollars in advertising without leaving an idea in the prospect's mind. He quotes the case of food producer Tyson, but also provides a bunch of positive examples leading the route of successful advertising with powerful slogans.

If you're interested in branding and brand mistakes, have a look at a new blog, "Brand Autopsy", it's excellent.