I'm on a thirty-day vegetarianism trial, and I was wondering how I would deal with this situation myself, come Thanksgiving. These are all great, tactful ways of dealing with the situation-- I was previously planning to just hope that in the bustle of serving everyone in my huge family, no one would notice that I didn't take any meat.
Not the best plan of action at all, I'll admit-- so thanks for posting this, gberardi.