Problem: Convert PDF to reflowable text, preferably HTML.
Why: This is because text that reflows based on the size of the screen, or the size of the font, or the length of a page (or indeed, without the concept of a page) is what suits mobile ebook readers, with smaller screens, best.
Apologies for two Geekery posts in a row. The rest of the discussion is under the fold.
Spontaneous ∂erivation 