Convert a PDF

I am in the process of putting up a site that will do a wide variety of PDF conversions... so far, it will convert the following:
  • Word to PDF
  • PDF to Word
  • Excel to PDF

I am currently working on the capability of converting jpg, png, bmp and gif to PDF as well... hopefully by the end of the weekend...

I have used WordPress as a CMS and will be modifying the theme, but I want to keep the three main conversion tools on the landing page.