I've finally discovered how to add a search engine for my blog in my blog. (I know there is a "search this blog" function in the navbar. but I do not find it very visible.)
For people who do not know about it, there is a service (free, as usual. But we know Google expands its empire this way), called "Google Custom Search" http://www.google.com/coop/cse/, which allows you to create a search engine which ranges over the sites that you decide.
Given that I liked the idea, I also created and added in the same site a "Philosophy Blog's Custom search", adding all my favorite blogs, like "Philosophy etc.", "PEA Soup", and many other philosophy blogs beside those I listed in my favorite link's section of the site.
This is its independent address:
Hope you enjoy.