I believe that they can't make any problem for you if you use the name of a product, referring to that product. And titles of songs are fine, too. But a line from a song, no. They get nasty about that.
But what would happen to freedom of speech if you weren't allowed to refer to what you're referring to? Watch me: Microsoft is the Evil Empire. Nintendo is crap. Little boys love Transformers, but girls don't like them as well. She Googled her own name and found 4,000,000 citations. Robin got his first Yahoo mail account on Friday.
Or, from my childhood: You'll wonder where the white went when you brush your teeth with Pepsodent.
The more lawyers claim, the less you should give them. Sure, they try to claim that you can't use their names (I went to Worthington Station by mistake, my home depot is Devonshire Place.)
But they can't make it stick.
And no, I'm not a lawyer.