Your best bet is probably to hyperlink to the Web page. Write some text (such
as "Take me to the page"). Hightlight the text. Choose Hyperlink from the
Insert menu. The details will vary based on which version of PowerPoint you
are using, but you can choose to link to a Web page. Then, when you are in
Slide Show view, a click on the text should take you to the page.
Another alternative is to insert a picture of the Web page. You can go to
the Web page and hit your Print Screen key on your keyboard. Now you can go
to PowerPoint and choose Paste from the Edit menu. This will paste a picture
of the Web page.
Finally, if you really need a live working version of the Web page inside
PowerPoint, you will need something like the LiveWeb add-in:
http://skp.mvps.org/liveweb.htm
--David
David Marcovitz
Author of _Powerful PowerPoint for Educators_
http://www.loyola.edu/education/PowerfulPowerPoint/