Show HN: Greasemonkey script to highlight rel= links

This is a userscript I wrote because I was curious how HN decides to put the nofollow attribute on links. Though I'm an experienced C programmer (among other languages), I decided it was time to learn browser-hosted JavaScript and wrote a Greasemonkey script instead of using one of the existing tools or userscripts.

As such, the quality's probably not great, but I'm throwing it out there anyway and would welcome any feedback or suggestions of better techniques to accomplish the same thing. If your curious as I was what the HN upvote threshold is for removing the nofollow tag, install the script and find out.

Here's the URL: http://userscripts.org/scripts/show/96207