Hi Rich; The PDF has to be filled out using Adobe Reader/Acrobat - it really won't work right embedded in a web browser since you can't guarantee Reader/Acrobat is used to fill and submit. In the case of Google Chrome it has it's own PDF viewer that will certainly not submit.
You can provide a simple link to download the PDF instructing users to fill out in Adobe Reader or Adobe Acrobat.
Your PDF form would not be too difficult to re-create using our authoring tools from what I saw once you copy and paste most of the initial text into it. Our HTML form (which also gives you the ability to send out as PDF) would be your best option.