I second Xubuntu. Out of the box, it works great, looks good, and Ubuntu has very good hardware support these days (trackpads with multi-finger scrolling works,

I second Xubuntu. Out of the box, it works great, looks good, and Ubuntu has very good hardware support these days (trackpads with multi-finger scrolling works, for instance). Kubuntu is ok, but sometimes terribly laggy (like when logging in).