I would like this software to include a reduction or shrinking of pdf size too. And I also would like to see txt , doc, docx, rtf, ppt, xls, , epub, mobi, prc, (and other ebook formats), swf (etc) conversion to pdf.

If you make these changes to your software, then I would be happy to try it as a result.
Make also sure to provide all the OCR for each language (modern and dead languages alike) available to your software so the converted pdf files will be accurate.