Powerpoint
I'd love to see something that we could use in powerpoint almost like a ticker, where students could text in questions and they would appear on the screen as they are sent. This could incorporate twitter too. When a student has a question they don't have to wait for me to finish a thought, they just text it in and it appears, and I can answer at the end of a slide or thought.

Hi there – we got your suggestion this morning and though it was such a great idea that we just built it in the last hour. Check it out, it’s called a “Free Text Poll”, and you can create one from the “New Poll” page:
http://www.polleverywhere.com/my/polls/new
It also works in PowerPoint and Keynote of course.
Just kidding. We built this back in 2008. It’s pretty rad. Gets better every year.
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Hi RP,
Each poll has a unique URL. You can send this link via email to the classmates or teacher.
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RP commented
How does my son e-mail his poll to 15 of his classmates. We're not even sure how to e-mail his completed poll to his teacher.
Thanks