Macropod is right that would be much simpler inside of office. To use it across other devices, pdf would be the way to go. I just tested a sample I saved as a pdf, and text hyperlinks retain their link to slides on the iphone as long as you open it up in ibooks. It didn't work when i tried it from the mail preview, be sure to open it up ibooks or whatever pdf viewer you use. Hold it sideways and a regular wide format slide should fit nicely on the iphone. The reason for doing it the way I suggest is only because I'm thinking .pdf is the best way to view it on mobile devices and still retain hyperlink functionality.