You wont get much sympathy from the fan boys because they dont see the ipad as a tool which is what should be. They play rather than use.
I have an ipad (3 actually), an iphone 4 and a large number of tablets (many obsolete now). Tablets are the utimate reference manuals and should be able carry 1000s of documents.
I have a reference library of several thousand books and twice as many documents. The point of a reference library is that it is a REFERENCE. You search and access frommultiple sources, you do not read fromcover to cover as someone suggested.
The ipad is a perfect reference tool. Looks like the software developers dont understand that. I am trying to incorporate my ref library divided into folders into iannotate. If you have any luck with the other apps, please post your recommendations.