With 2 weeks remaining in May, theoretically, we should be seeing Documents To Go (Dataviz) on the AppStore soon. There is no new information on Dataviz.com nor on Dataviz's Facebook fan page, other than more than a few posters beginning to express their impatience.
For those folks that were not Palm users, Docs To Go was (and is) arguably the office suite product of choice for the Palm OS.
There are a lot of us waiting to see if Dataviz can deliver for the iPhone OS. Dataviz has had almost a year to work on their office application, thus expectations are high, hopefully this recent silence from Dataviz is a last minute coding crunch, taking from and learning from the mistakes that the QuickOffice team has made.
[UPDATED] : Dataviz sent DTG to Apple on 5/19, approval usually takes ~8 days, we should be seeing Documents To Go for the iPhone today or tomorrow. On the Dataviz Facebook fan page, they are promising very good pricing on their flagship application.