Hi Ram,
I faced similar problem in 2006 and i wasn't able to find any direct way to import excel sheet to PDF form. But i found that PDF forms objects (in Form Ready / Init event) can talk to HTML static HTML (Using JavaScript) and then JavaScript can talk to Excel Sheet.
So I wrote a mechanism using JavaScript to upload the data from Excel Sheet to PDF form and for that I requested my clients to open that particular form in HTML to fill it with excel data.
If you will search on HTML and PDF designer you will find something.
I hope it will help.
Regards,
Atiq