Try Poll Everywhere.com. It's free for up to 35 users, and they can do multiple choice or short answer. You can also set it up to enter answers via text message. It's not graded, and you can't see who responds, but you do get the number of responses. I use this all the time in my classes.
Not to push you anymore then you need but here is a link to how to's http://www.google.com/google-d-s/tour1.html
There are templates you could use and/or under the drop down new you can make a form. Once made you could bookmark in on your computer that is hooked to the ipods. Sync the bookmarks. Once you are presenting you could have people go into Safari bookmarks and link in.
If this is still no good, Let me know more on what you are presenting and I can try to help find something fun to use as part of it.
Thanks, will check this out...I do appreciate your help.
There is nothing like a deadline to make you work!
Email me at firstname.lastname@example.org and I will forward an invite so you can see what I am working on!
Fun is not a problem, feedback and surveys are!