If you're a Quicksilver user, doing a simple macosxhints.com search with it is exceptionally easy. On their site is a page which lists many web searches that can be done "out of the box." I added one into Firefox from the site:
qss-http://www.macosxhints.com/search.php?query=***&type=stories&mode=search&keyType=all
This drives a simple search of the Mac OS X Hints site. Also on the Quicksilver page mentioned above are qss-http URL protocol template links for tons of sites, including macosxhints.com. They can be put into a bookmark, or stored on the file system and still get picked up by Quicksilver.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20051125100827664