I am currently moving a site over to MVC with great success, but I have a couple of pages which have a mailto link on them. Is there a way to get this to work with Html.ActionLink?
Html.ActionLink is meant to do just that, render a link to an action method URL; a mailto: link is a special case, a pseudo-protocol which is acted upon by the client's browser.
Just use a straight HTML anchor tag in your view, there's nothing wrong with doing that.