Is it too early to be thinking holiday cards? I don't think so. It's almost crunch time for greeting cards companies to make sure they have their holiday offerings out. You can't procrastinate in marketing, there is no wiggle room when you are competing to stay on top!
While I don't have twitter (Instagram is more my thing), one of the companies I freelance for does. They just received a pretty sweet tweet after their latest agency mailing, and guess what, it was designed by me!