The growing availability of wireless and free Internet connections provides presenters with a good chance of giving a presentation in a locale with an Internet connection. Since many businesses and presenters have web sites and other online resources, they might consider incorporating them into their presentations.
However, don't build the presentation to completely rely on the Internet. For one, the Internet can go down while you give your presentation. You could also discover that you can't connect to the locale's Internet. Create your presentation knowing that the Internet may not be available for your presentation. Besides, some hyperlinks don't rely on the Internet. These open files and jump around your presentation.
Besides, you're the star -- not PowerPoint. PowerPoint and any other presentation tools complement your storytelling. If they dominate, be prepared to lose your audience.
In any case, you can include links to web sites, other online documents and files on your computer in your presentation.
Note: These instructions are for PowerPoint 2003. For PowerPoint 2007, replace step 2 with the following: Go to the Insert tab and click Hyperlink from the Links group.