Here is a pretty basic RSD website with a form added to it and it works perfectly. This uses the Export > Manual Server Setup which generates this block of code:
<noscript>
<iframe height="830" style="border:none; background:transparent; overflow:hidden; width:100%;"
id="fb_iframe" src="contact/contact.html">
<a href="contact.php" title="contact">Check out my CoffeeCup Form</a>
</iframe>
</noscript>
http://hotsync.net/rsd/products.html