Like I said if you want to do something someone is prob already figuring out a way to do it.How do I copy Keynote presentations onto my Apple iPad? :: Free Tech Support :: Ask Dave Taylor!®

As for accessing your files while away from home? Done.
Access Your Computer From Anywhere on Your iPad

Apple iPad Mac Version Keynote Documents iPad Version Edit Microsoft Word Documents Launch Keynote Launch Pages Microsoft Word Copy Keynote Presentations Mac OS Powerpoint Presentations it can all be used.

Edit : Quickoffice adds full PowerPoint support for the iPad | ZDNet

Edit again: Can the iPad be used to type documents? Can it open and save Microsoft Office files? Can it open and save PDF files? @ EveryiPod.com

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