There's a method that normally works against bots harvisitng your E-mail from your website. There's a special word for it that I don't remember, but basically it uses HTML charcter coding to type the address. It displays just fine in a browser becuase it's rendered proerly. I think it should also work in your form.
I was going to post an example, but it got rendered and didn't show the behind-the-sceans stuff. Check out the link...
that came from this page