OK, let me start by saying that I am not a fan of DataViz. I think they charge too much for their product and they definitely charge too much for very minor upgrades. They also have a real bad habit of making a couple of minor changes then calling it a full upgrade to a X.0 status of a paid upgrade. In fact I dont think they have ever had a X.1 free upgrade of any version of Documents ToGo in their history.
That being said we were always told that the Pre would ship with a Document Viewer. I think that DataViz has every right to charge a fair price for a full Document Editor suite.
Unfortunately version 2.0 will be out in about 9 months and will probably cost us another 29.99 upgrade fee. Then they will come out with a "Premium edition 2.0 that will cost us another 19.99 upgrade fee. This will probably all happen in the first year. A few months later version 3.0 will be out.... You get the picture.
Did I mention that I hate DataViz.