DataViz started talking about Office support for the iPhone last Fall and according to AppScout we should see the official announcement of Documents To Go for the iPhone at MWC in just over a week. In addition DataViz may be announcing Documents To Go for the Google Android platform as well as RoadSync for Android. I use their excellent RoadSync product to sync to my Exchange server on my Nokia E71 S60 device and it is killer. I have been testing and liking TouchDown on my G1, but with the vast experience of DataViz I am looking for an even better product in RoadSync.
One of the main reasons I don't use my original iPhone much is the lack of Office document support and with software like Documents To Go I may find myself using my iPhone more and more. RoadSync and Documents To Go on my G1 are even more exciting since I use my G1 quite a bit to get 3G data on my T-Mobile account.