We didn't know our smartphones weren't quite smart enough to need a guide to the interwebs, but the Foleo syncs to your mobile device, providing a full size keyboard and larger display for editing documents and triaging email (among other things).
On the one hand, he noted that Microsoft has a long history of providing cross-platform applications. (You can run Office on the Mac, for instance.) And he also noted that you can run the limited function Web-based version of Office in a browser on basically any device at all, including iPads and iPhones, to read documents and do some light editing.