Here are some links to a css toggle nav, an animated hamburger button, and a plugin that lets you do flyout menus. Thanks to Gabe and Vince for letting us know about these great things!
CSS Toggle Nav:
http://www.outofscope.com/css-only-menu-toggle-no-javascript-required/
CSS Animated Hamburger Icon:
http://www.elijahmanor.com/css-animated-hamburger-icon/
Slidebars plugin:
http://plugins.adchsm.me/slidebars/