if you really need someone to answer this question, then you already have some doubts in your mind about doing it, so don't. Read through this forum and pick up some tips about regging generic domain names and stay well away from TM names!
I personally would definitely not. Google is a major brand name with protected rights. Most/all uses of this domain that generate profit are going to be a violation of Google's rights. I would guess Google can afford good lawyers too.