i found an awesome FREE survey tool, which works great with wordpress
my wordpress demo here:
you display it in an iframe, or with a script.
here are instructions on how to make your iframe auto-size to fit the remote survey, as you page through survey pages of different heights:
they provide fantastic data-reporting tools and exports, free.
this is now my default tool for making any kind of contact form or data-collection form on all of my sites, wordpress and otherwise.
they even have a wordpress plugin