Open PowerPoint and click the "LiveSlides" tab on the ribbon in the upper right.
Next click the "Live slide" button to bring up the LiveSlides dialog.
Enter the Twitter hashtag you want to display in your slide and click "Go".
Copy the URL of the Twitter wall from the browser.
Paste the URL into the LiveSlides dialog and click "Insert".
A placeholder image will now appear in your slide.
Enter presentation mode to view the live web content.
Select your presentation software for instructions on inserting Tweetbeam into Keynote or PowerPoint on Mac.