Holy crap, I did it. I figured it out.

http://goycodesign.com/pushButton.swf

Here's the code:

on (press) {
getURL("http://twitter.com/home?status=I just pushed a button "+_root.score+" times at http://bit.ly/9XsGYz %23PushMyButton","_blank");
}

the %23 is a hash tag "#"