I just mucked with a few things using only CSS and got it to look good (in my opinion), but you'll need to test in other browsers and see how it goes. To make the changes, try adding the following to your CSS files (a quick guess is that templates/rt_zephyr_j16/css/template.css would be the best file). You don't need the comments /* xxx */, they're there to explain each change, but shouldn't hurt if you include them.:
.rt-grid-6 ul li {
float: right; /* make links horizontal */
margin-left: 10px; /* put some space between them */
list-style-type: none; /* get rid of the bullet points */
}
.rt-grid-6 form {
height: 46px; /* move the Login With Facebook button up by making the form 'seem' smaller */
}
.rt-grid-6 .fb_button {
float: right; /* move the button to the right of the page */
}
Test it out, and let us know if that's what you're looking for. If you need more control, you can do a template override of the login module, which let's you actually change the HTML to move and re-arrange things. Not too hard, but if the above works.. that should hopefully be all you need.
Good luck, and love the animation on the home page