CSS Lists

Using Symbols

http://flipc.blogspot.com/2010/09/using-symbols-with-css-content-element.html
http://www.w3.org/TR/html4/sgml/entities.html

You must use the Hex value

ul.nav > li:before{
	color:#00F;
	content:"\25CA ";/* &loz; - &#9674; decimal */
}
ul.nav > li:before ~ a:active,
ul.nav > li:before ~ a:focus{
	color:#0F0;
	content:"\2666 ";/* &diams; - &#9830; decimal */
}

Links

A List Apart: CSS Design: Taming Lists by Mark Newhouse
Mozilla Developer Network: Consistent List Indentation
Styling Ordered List Numbers