My sister recently sent me an email forward. You may have seen it. I'll just tell you the idea.
"A fifth grade teacher in a Christian school asked her class to look at TV commercials and see if they could use them in some way to communicate ideas about God. . . " (example)
God is like COKE
He's the real thing.
I'm not sure what I think. There's a way it's clever and fun. But I'm not sure God needs a slogan. I tend to think that trying to fit God into our cultural boxes somehow makes him less than who He is. In my mind, it doesn't make Him bigger. It makes Him smaller...