When I upgraded to the WordPress 2.8 several weeks back, it broke the Search Everything plugin, so I had to deactivate it for the time being. Well, now it’s fixed. Search once again also looks at tags, meta info, and comments.
If you’re running the Search Everything plugin on your WordPress site and are still getting no results on your site, set “Search every category name and description” to BLANK. Turns out that setting this to “yes” was the culprit that kept the latest fix from working. I’ve now submitted a bug report.
If you’re running WordPress, I highly recommend the Search Everything plugin, especially if you make use of tags. Including comments also adds a lot of relevant keywords that someone might be using to find a specific blog entry or comic.