Following is a list of questions that speakers should ask meeting planners in getting ready to speak at an event.  You won't need to ask all of them all the time; the list is meant to give you a broad set of ideas. 

A.  The Venue

When is the speech taking place?
Where?
How many in the audience?
What time of day? How long should the speech be?
Will the audience be eating or have eaten?
What is the hall like?
Is there lighting?
What is the sound like?
The layout?
Are there backdrops, sets, stages, props, podia?
Are there barriers between speaker and audience?
How long is the audience’s day?
How many other speakers?
What is the nature and content of those speeches?
What kind of chair is the audience in?
How long have they sat there?
What is the event theme?
Slogan? 
What is the arrangement for slides and other visuals?
How quiet is the hall? 
Is there background noise?
When can we get in the hall for rehearsal?

B.  The Audience

Describe the audience
What is the age range?
Socio-economics?
Do they know each other?
Do they work for the same or difference orgs?
Describe the organization(s)?
What should my talk be about?
What is the point of the event for the audience?
How is the audience feeling?
What is the business climate?
What does the audience fear most?
What are their hopes and dreams?
What makes them laugh or cry?
What makes them worry?
What do they need to succeed?
What are their cultural references?
What is they worst speaker they’ve ever seen?
What would you like them to do differently as a result of the talk?
Who are their heroes and villains?
What are their recent successes and failures?
Why are they there?
Have you made any arrangements to get feedback? 
A DVD?

C.  The Speech

Why did you pick me?
Who or what determines the success or failure of this event?
How will that be measured?
How does the idea of my speech work for your event?
Give me some audience members that are great (or bad) examples of the points of my speech?
Can I interview them?
What is the problem the audience has for which my expertise is the solution?
Is the audience expecting interactivity?
Is the audience used to Power Point?
Can I ask for volunteers?
How many of them will have read my book?
Can we arrange for a signing/sales event?
What journey do you want the audience to go on?
Why should the audience pay attention to my speech?
How will you know if they have taken something important away from the speech?