Great idea, though I haven't had a chance to use it much (yet). I especially appreciate the end-user control of the documents - that they never leave the user's computer. A question for any newish PDF application developer:

A valuable feature of PDFs is wide and long compability. What I output now should be fully readable and usable on any system and in 20 or maybe 50 years. [0]

How do you have confidence that what you implement meets that specification? For example, if I edit the text, how do you know BreezePDF isn't subtley corrupting it? If I compress or flatten it, how do you know that about the output?

In fairness, it's a question for any file-based application, but PDF has a special status in it's universal availability and functionality.

[0] Is the timeframe in the spec somewhere?