No Follow links outlined by dark green dashed borders.
Links are outlined by red dashed outlines on mouseover.

Links going to a new page get cross-hair cursor on mouseover
_new link turn white with red background on mouseover (cross-hair)
_blank link turns white with blue background on mouse over (cross-hair)

JavaScript links get move cursor on mouseover.

The "border" outlines around a hovered link caused intensive vibrating on some sites, such as hovering over internal menu tabs at the top of http://www.componentsoftware.com/products/CSDiff/index.htm which has it's own JavaScript mouseover coding so changed "border" to "outline" so page is not reformatted when hovering on a link. Outlines will appear outside of borders.
a[href]:hover { outline: #FF0000 dotted 1px !important; }

If you tire of misrepresented coloring for visited and unvisited links take a look at http://freestyler.ws/style/12615/red-mark-visited-links-as-read-on-unruly-domains (16842) or http://freestyler.ws/style/13087/red-visited-mark-visited-links-red-dm (17357).

Updates: since 2008-10-04
2009-0