The word “take” often indicates movement away from the 'speaker', while “bring” indicates movement toward the 'speaker'.
She was invited to be a 'guest speaker' [=to give a speech] at the conference.
Senator Williams was the 'keynote speaker' at the convention.
(..) Using of the Rogaine, check. And make sure to call me right when you get to the hotel, not like that... Conference in Phoenix. I had to wait two hours for you to call me. I was the keynote speaker. I was late to the podium. Still.../ Yeah, you're totally right. I'm sorry. What is the matter?/ (..)2009 The Hangover