I already have a document engine source (supporting FB2, TCR, HTML, TXT, and ePUB document format). It is written in C++ and it has cross-platform XML/CSS, so it wont be problem recompiled under Mac OSX, Linux, or Win32. I will use XCode 3.2 for recompiling this into IPad environment. If you need it in hurry, then I will only have 3 work days for modifying, compiling, and evaluating under IPad. Let me know.