I really like the new Twenty Ten theme for wordpress. I was looking for something else and came across a page that shows how to make some minor changes to the theme. I really wanted a drop shadow, so I added that.
/* The main theme structure */
border:1px solid #000;
-moz-box-shadow:3px 3px 15px grey;
-webkit-box-shadow:3px 3px 15px grey;
/*end of added these*/
padding: 0 20px;
It was added to the #wrapper section of the style.css