I just tried something and it worked
This might help some of you. I went to Google because of an article I just did on Tron Legacy. It stars Olivia Wilde so I checked out Olivia Wilde on Google at the top of page one Google for some reason is showing Twitter post Now I have never seen that before. So I then went and made a post to Twitter on the bio I have on her.
Guess what? A few seconds later it showed on page one. I went from 9 viewing to 27 viewing in seconds. All because of that tweet.
I don't know how long the tweets show or how Google picks what tweets they show. or what topics but if your timing is right this could be a good plus to your site.
Update: My post stayed up for 39 mins before other tweets replaced it.