Obviously, I'm on Twitter. But these days, who isn't? Twitter not only gives people like you and me a chance to speak our minds, but it also gives celebs a direct link to their fans. And for some geeky celebs, it's more than just a popularity contest — they actually update their Twitter page quite often! So you not only get a real glimpse into their lives, but you see what's going in inside their heads. Check out these 10 geeky celebrities you should be following.