Type 1 ($250-750):

implement pdf text reflow (convert to html format; image support will be better; smaller library size better too), need to support English/German/Russian/Chinese/Korea/Japanese char codes.

Type 2 ($1000 or higher):

implement original pdf viewer like "Adobe Reader" or "ezPDF Reader" or "RepliGo Reader"

Additional for Type 2 (plan):

save highlight, annotation, note back to pdf.