doh I was tired
and read the title back to front
I have only used "
Zamzar Free online file conversion" for converting PDF files to word.
It does the job pretty well, you upload your pdf file and choose the file format you want to convert to, enter your email addy and they email you the link to the converted file. It can take a while for the email to arrive (they warn it may take a hour) and the link only remains active for 24 hours.
Due to its an online service I haven't used it for private docs etc and only use a gmail addy.