To help make searching macosxhints.com easier, and to take advantage of the Google index of the site, I created a Firefox search engine plug-in to search MacOSXHints using Firefox and Google.
To use, first download the archive and expand it (and then make sure you quit Firefox). Take the two files inside the expanded folder, googlemacosxhints.gif and googlemacosxhints.src, and place them in your user's Library -> Application Support -> Firefox -> Profiles -> profile_name -> searchplugins folder. Note that you may have to create the searchplugins folder, and profile_name will be unique to your system.
When you re-launch Firefox, you'll see a new Google | Mac OS X Hints entry in the Google search box. Select it, enter your search terms, and you'll search macosxhints.com via Google's index.
[robg adds: This plug-in does the same thing as running a site:www.macworld.com search_term search on google.com, but makes it much easier to do so. It worked as described when I tested it.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20070112124806562