I usually just let my Web Part ride on SharePoint's form tag. If you are
in a Web Part Zone, you know you are in a <form runat="server">

How would I set the action="http://www.whatever.com/"?????

I was wondering if I could write  out a form in javascript on the
prerender?

Thoughts?

In C# it looks something like this:
HyperLink link = new HyperLink();
link.NavigateUrl = "http://MindsharpBlogs.com/Todd" target="_blank" rel="nofollow">http://MindsharpBlogs.com/Todd";
link.Text = "Todd's Blog";

this.Controls.Add(link);

In JavaScript it looks something like this:
var newLink = document.createElement('a');
newLink.innerHTML = "Todd's Blog   ";
newLink.href = "http://MindsharpBlogs.com/Todd" target="_blank" rel="nofollow">http://MindsharpBlogs.com/Todd";

var uptoLink = document.getElementById('onetidPortalConn');
if(uptoLink)
{
uptoLink.parentNode.insertBefore(newLink, uptoLink);
}