[phpnode]

Upgrade the links with jQuery. Here's a simplified version of what I use:

    $("a").bind("mousedown", function(e) { 
        $(this).data("href", $(this).attr("href"));
        $(this).attr("href","http://example.com/redirect?url=" + $(this).attr("href"));
    });
    $("a").bind("mouseup",function(e) {
        var el = $(this);
        setTimeout(function() {
            el.attr("href", el.data("href"));
        },10);
    });

This works by switching the url when a user clicks a link to your redirect url, then switching it back a fraction of a second after they mouse up. This means that your redirect works even if the user right clicks and opens in a new window / tab and when a user hovers over a link, they still see the normal URL in the status bar.

On the /redirect url just log any data you need and send a 301 or 302 redirect. The destination site will see your original page as a referrer, not your redirect url.

[dmethvin]

It doesn't work for keyboard access in the sense that you don't insert the redirect, but at least the link still takes them to the right place.

Seems like the original link following the `url=` should be processed by encodeURIComponent or else any original urls with chars like ""&" will break.