It seems that that there could be a lot more done with WordPress’ internal search. More results, better options, filters, or something to make the user experience better. So I started looking for options.
One option I found was Lijit. Lijit offers the ability to allow your users to search your blog, bookmarks, photos, videos, social networks such as Twitter, and other sites from one search box on your site. It seemed like what I was looking for, so I installed it.
The downside to Lijit is that it can give other sites more visibility via advertising or the web searches tab. And taking traffic off your site isn’t always a good idea. The upsides though are that you can include many blogs, social networks and all sorts of different things into your search results. Lijit makes it all about your network of sites, not just about one blog.